How's your MPG?

[Rreemo]

I finally ran out my first tank over the weekend, and while the dash was saying 14.6 avg, I hand calculated it to be 19.1. I've been pretty easy on it so far as well....haven't taken it over 4000-4200 rpm, and this has been mostly city driving, but some mix. I'm thinking 19 is pretty good for the first tank...I know it will get better over time too, as it learns driving strategy, etc.

On the fuel subject...was also wondering what grade you guys are running and if you can tell a difference. This being the first tank that the dealer filled, I'm pretty sure it was probably just 87.

[SNEAKY]

They 93 and get more mpg out of it. Nit sure of the price/milage break down. Ours averaged 22-23 on te dash . Toll way and 380 back and forth from Denton to Allen .

[DirtyD]

Not sure what the algorithms look like on these cars for the inboard MPG calcs, but I'm pretty sure it can't be THAT much difference between the two. The only thing I can figure that would cause that would be resetting the onboard MPG without resetting the trip od.

Also, to truely break in these cars, you need to beat them into the ground for at least the first 1000 miles. Big discussion about the break-in procedures for modern cars. Days of being light are over. Vary the RPMs as much as possible, and give it some short spurts of spirited driving to help the ring seat better.

Back on topic, I have been through 5 fillups since I bought the car. 1 via dealer (87) and 4 myself (3-93 & 1-91 in OK). I have seen anywhere from 14.7 (14.5 in-dash) up to 21 (20.5 in-dash) on a full tank. As far as highest period on the in-dash readout, I've seen 23.6 on a stretch of highway driving @ 70 this past weekend.

[Grandpa]

Title was supposed to be "How's" your MPG....fat-fingered that one!

Fixed it for ya sir. I've gotten as much as 27mpg btw. :)

Not sure what the algorithms look like on these cars for the inboard MPG calcs, but I'm pretty sure it can't be THAT much difference between the two. The only thing I can figure that would cause that would be resetting the onboard MPG without resetting the trip od.

Also, to truely break in these cars, you need to beat them into the ground for at least the first 1000 miles. Big discussion about the break-in procedures for modern cars. Days of being light are over. Vary the RPMs as much as possible, and give it some short spurts of spirited driving to help the ring seat better.

Back on topic, I have been through 5 fillups since I bought the car. 1 via dealer (87) and 4 myself (3-93 & 1-91 in OK). I have seen anywhere from 14.7 (14.5 in-dash) up to 21 (20.5 in-dash) on a full tank. As far as highest period on the in-dash readout, I've seen 23.6 on a stretch of highway driving @ 70 this past weekend.

LMAO, then I might be screwed because I have yet to really open my car up and I've got 3k miles on it.

[DirtyD]

Fixed it for ya sir. I've gotten as much as 27mpg btw. :)



LMAO, then I might be screwed because I have yet to really open my car up and I've got 3k miles on it.
That's just coming from 98% of the guys on SVTP. Many threads and discussions about breaking them in. They say that if you are light on the motor now, it won't really like it when you beat it later down the road. Where as, the earlier and more often you beat it, the more it will thank you later.

^That's sig worthy right there. :lol:

[Grandpa]

How would anyone know that for a fact before anyone has had a chance to put high miles on one to come to that conclusion? lol.

[DirtyD]

How would anyone know that for a fact before anyone has had a chance to put high miles on one to come to that conclusion? lol.
:confused: honestly, IDK.

But i still beat my car regardless. It's just too much fun!

[UT5.0]

With my tune driving 60mph i get 28+ mpg and 25+mpg going 80. Tunes give better gas mileage for some reason

[DirtyD]

Because the Ford tune is more of a conservative, generic vehicle tune, I'm sure. I know Shaun at AED garuantees a min. of 3 MPG increase over stock under 2k RPM. I haven't really seen the true hwy MPG on my car yet, but hoping to this weekend. Might take it out for a nice little drive.

[Doug1227]

My commute to work (8 miles is all stop and go below 45) nets me about 15mpg.... once I get on the highway it jumps up closer to 24 or so... Big swing between city and highway!

[Courtesy Flush]

(insert sarcastic quote about sports cars and mpg) but seriously...whats mpg?

[DirtyD]

SPM or GPG

Smiles per mile or Grins per gallon

[downtime!]

I get a solid 22-23 out of mine, with the GH tune running 93. And I agree on the break in deal. I had the VMP tune on mine and had her at the track on the 3rd or 4th day.

[Rreemo]

I haven't really been worried about hurting it or anything...hell if that happens this early on they'll damn sure fix it under warranty! I think more-so to me it's just that its a brand new car and I like to really get the feel for things, maybe run a tank or 2 through it before I go trying out the track apps and/or showing up at Northstar with a paper tag on it! :)

I know it's different than talking a new car, but I've been building engines for many years now, and I've always done the same thing with all of them....initial ring seat and break-in the cam at 3000-3500, cool it, then heat cycle it a couple more times...up to op temp at varied RPM...cool it again, change oil and filter, take a read on the plugs, and pretty much let it rip! I've never had one prematurely come apart by this method....I doubt these new ones are really any different when it comes down to it.

Speaking of MPG....my 911 did really well, clocked upper 20's pretty much all the time. The last tank I ran through it (93 octane of course), showed 26 on the dash, hand calculated just over 25....and that tank included a night at Northstar with several 1/8th mile passes. :D

[DirtyD]

I haven't really been worried about hurting it or anything...hell if that happens this early on they'll damn sure fix it under warranty! I think more-so to me it's just that its a brand new car and I like to really get the feel for things, maybe run a tank or 2 through it before I go trying out the track apps and/or showing up at Northstar with a paper tag on it! :)

I know it's different than talking a new car, but I've been building engines for many years now, and I've always done the same thing with all of them....initial ring seat and break-in the cam at 3000-3500, cool it, then heat cycle it a couple more times...up to op temp at varied RPM...cool it again, change oil and filter, take a read on the plugs, and pretty much let it rip! I've never had one prematurely come apart by this method....I doubt these new ones are really any different when it comes down to it.

Speaking of MPG....my 911 did really well, clocked upper 20's pretty much all the time. The last tank I ran through it (93 octane of course), showed 26 on the dash, hand calculated just over 25....and that tank included a night at Northstar with several 1/8th mile passes. :D

Well after hearing that, what do I know. Haha.

[Rreemo]

Well after hearing that, what do I know. Haha.

I'm thinking plenty....bc you essentially had the same suggestion....drive it hard from the get-go! ;)

[46Tbird]

I waited about 1200 miles before dogging it, and took it to the track at 2400 miles where it went 7.9. I don't think it matters for shit, but personally I prefer to let the cam, crank, and rod bearings establish a wear pattern before taking it to 7k. Ring seal is only an issue on cars that wash them out (carbed, usually) or if you let it get hot causing the rings to lose tension. That's my experience, yours may vary.

Anyway, I average 17.5 to 19 on any given tank. I have gotten as low as 14 and as high as 27.8 coming back from Austin with a crazy tail wind. Highway mpg is usually around 23. That's with 3.73s and 28" tall tires.

Jason, I've never heard of that great a disparity between the dash mpg reading and calculated mpg. It's usually 1-2mpg off at worst.

[Quake5.0]

I have a mech friend at Bob Thomas Ford that works only on performance issues and warranty issues. He said ford sent out to all ford dealers service heads that it is better for the car to get driven hard from day one. Reason being they spent a lot of time and testing it in racing and extreme everything to do with what ever you can throw at it and found it to be really bulletproof. Plus they tuned the car down with the computer tune cause this motor is very powerful for what it is.

Just what I was told.

[virtu]

I've gone thru about 6 tanks of gas so far and I seem to average around 15mpg. 75% city/25% highway. Just crossed 1,400 miles on the odo yesterday. If I reset the mpg calculator while on the highway, I can get it to hover around 22-23 doing 80mph with the A/C on. I also have the 3.73 gears.

[virtu]

Oh and I only run premium.

[DirtyD]

FWIW, if anyone would like a copy of the spredsheet I put together to keep track of MPGs, just let me know. I'd be more than happy to send you a copy.

[Rreemo]

I waited about 1200 miles before dogging it, and took it to the track at 2400 miles where it went 7.9. I don't think it matters for shit, but personally I prefer to let the cam, crank, and rod bearings establish a wear pattern before taking it to 7k. Ring seal is only an issue on cars that wash them out (carbed, usually) or if you let it get hot causing the rings to lose tension. That's my experience, yours may vary.

Anyway, I average 17.5 to 19 on any given tank. I have gotten as low as 14 and as high as 27.8 coming back from Austin with a crazy tail wind. Highway mpg is usually around 23. That's with 3.73s and 28" tall tires.

Jason, I've never heard of that great a disparity between the dash mpg reading and calculated mpg. It's usually 1-2mpg off at worst.

Yeah Danny, I'm not paying much attention to that first one, honestly. Not sure what was up with it, but I'm about to need fuel again today or tomorrow, so we'll see how it pairs up this time.

17.5 - 19 seems to be pretty good, and honestly about what I was hoping for. I'm guessing yours is still basically stock and untuned, right? I'd imagine those 28" tires help offset the 3.73's a little as well.

Speaking of (off topic for everyone with 3.73's)....I seem to notice something, not sure what, right at 70 MPH...it's very faint, just a little NVH coming from somewhere....not sure if its the gears, or maybe very slightly something with the driveshaft (balance), or maybe it's just the engine note at that particular speed/RPM....just not an entirely smooth spot. I'm wondering if anyone else has noticed something similar?

I'm overly sensitive to stuff like that...probably leading back to my days in the dealership when I did NVH stuff a lot. It's probably nothing, And I'm probably also just used to the 911, which was extremely (maybe even abnormally) smooth all the way up and past the 3-digit mark.

[PLASMAN]

Just took off my muffler deletes and put GT500's on and it went up 26mpg hwy, 22mpg city avg 23.4. Tuned

[Midnight11]

^im interested in your muffler deletes when I get mine in...

[DirtyD]

Just took off my muffler deletes and put GT500's on and it went up 26mpg hwy, 22mpg city avg 23.4. Tuned

What type of city speeds do you typically drive? And are that spaced out lights?

[PLASMAN]

^im interested in your muffler deletes when I get mine in...

Sorry bro sold them to a dude on SVT, didnt think anyone here would want them, they droned like a mofo

[PLASMAN]

What type of city speeds do you typically drive? And are that spaced out lights?

I drive I35 from carrollton to duncanville everyday 33 highway miles, then about 5 city so a total of 38 miles one way 90/10 HWY/CTY
Hwy speeds 75, city 40 ish, not too many lights

[Midnight11]

Sorry bro sold them to a dude on SVT, didnt think anyone here would want them, they droned like a mofo

damnit! its cool im just gonna hate the stock exhaust lol

[PLASMAN]

damnit! its cool im just gonna hate the stock exhaust lol

Theres a guy on svt talking about how he drilled some holes in his stock mufflers for a delete sound, if anyone wants to try it you can have mine

[DirtyD]

Theres a guy on svt talking about how he drilled some holes in his stock mufflers for a delete sound, if anyone wants to try it you can have mine

I have mine available as well, if someone wants them to try.

His idea actually doesn't sound that bad, but not really my cup of tea.

[DirtyD]

I drive I35 from carrollton to duncanville everyday 33 highway miles, then about 5 city so a total of 38 miles one way 90/10 HWY/CTY
Hwy speeds 75, city 40 ish, not too many lights

Shoot, that's nothing then. Haha

[Grandpa]

damnit! its cool im just gonna hate the stock exhaust lol

Haha, it's not THAT bad to have a quiet car, but I must admit I do miss having a lil bit of a rumble. I've even been considering doing an O/R H with some GT500's, but that means I'll have to get a tune as well.

[kanetrain]

100% city driving I get ~15. With a canned SCT 93 "performance" tune.

[Eaglei532]

damn I get like 12MPG

[BLK2012GT]

I know I'll be getting better mpg on monday since I'm switching back to the stock 3.31's.

[Midnight11]

That didn't last long lol

[Grandpa]

I really like the 3.31s. Ive had 3.73s and 4.10s several times and i like these the most. I think it will be awesome once the blower goes on. A real managable gear with boost on the street.

[BLK2012GT]

That didn't last long lol

Yeah tried the nitrous in 2nd and 3rd gear and yeah.........just not going to work.

[Rreemo]

Second tank hand calculated 17.5, dash said 17.2 avg.

[DirtyD]

Second tank hand calculated 17.5, dash said 17.2 avg.

That's more like it. Lol. Sounds like someone at the dealer reset the readout or something.

[Kronis]

I usually grab around 25-28 on the highway according to the dash depending on hills and such.

City, if I cruise, I break 20s pretty easily.

But what fun is that? :driver:

[DirtyD]

You rocking the stock 3.31s?

[Cabikejumper]

I get around 7mpg highway

[GARS50]

Best I have seen is 26.4 Hwy to Louisiana. I average 20.8 city, driving 17 miles to work and 17 miles home then 1.5 miles to the gym and 1.5 miles back. I just use 87, I don't get on it too much either.

[Kronis]

You rocking the stock 3.31s?

Nope. 3.73s. :win:

[OG Fox]

i have 373s and I get between 17 and 21 depending on my driving style. i get 5-10 on race days.

[DirtyD]

Nope. 3.73s. :win:

Damn you. :biggun: lol

[Grandpa]

Damn you. :biggun: lol

3.31's are a better gear for a blown car anyways. :win:

[DirtyD]

3.31's are a better gear for a blown car anyways. :win:

3.55s FTW

[89gt-stanger]

19.2avg. Auto 3.73's

[46Tbird]

I average 17.5 to 19 on any given tank. ... Highway mpg is usually around 23. That's with 3.73s and 28" tall tires.
Just an update, the new engine is getting 20 city and 27 on the highway. I am averaging 22-23mpg now with no other changes (~18% improvement). I don't understand why it would be any different, but I'm glad to see mileage getting better instead of worse, lol.

This is a 2013 service replacement engine and Ford's latest calibration.

[Grandpa]

Are you sure that other motor didn't have a tune on it?

[46Tbird]

No, this car has never had a tune. I bought it off the lot with 104 miles on it, so I think I would know if it had ever gotten one. lol

[Phuck Phace]

I'm getting about 16mpg average city/hwy right meow.

[merlinmol]

On the way back from Vegas I was reading between 19 and 20mpg, but I calculated 24+ by hand. I was thinking that is because I'm running the can tune on it currently. Guess we will see once I have a chance to get it custom tuned.

[DirtyD]

I got 25.5 in dash on the way home last Wednesday (310 miles), averaging 70-75 mph over the entire trip. No a/c and windows down majority of the time.

On the way back, I got around 23.5, but that was fighting nasty traffic south of Conroe on 45, and running no slower than 75 once the traffic opened up (hit 100 a few times :D)

[Rreemo]

Update - still un-modded, averaged 22.4 on the Powertour taking the tour routes to Memphis....included a little spirited driving and a few decent burnouts.

All hwy on the trip home...using the cruise at 70mph most of the way, netted 26.6. Turned over 10K miles on the trip home too.

Not bad for a portly 3.73 car IMO.

[Grandpa]

Update - still un-modded, averaged 22.4 on the Powertour taking the tour routes to Memphis....included a little spirited driving and a few decent burnouts.

All hwy on the trip home...using the cruise at 70mph most of the way, netted 26.6. Turned over 10K miles on the trip home too.

Not bad for a portly 3.73 car IMO.

Nice! I bet that was a fun trip. One of the things on my car guy bucket list to do!

[Special K]

I get 13ish on my daily commute and was stunned @ 25 I got on my trip to Athens last weekend!!!

[El_Tortuga]

13-15 in my normal commute but its only 5 city miles each way with a short burst ( or two) :) I've yet to get a good hiway trip.

[merlinmol]

I get 13ish on my daily commute and was stunned @ 25 I got on my trip to Athens last weekend!!!

13-15 in my normal commute but its only 5 city miles each way with a short burst ( or two) :) I've yet to get a good hiway trip.


Odd, I get almost 17 city... most the time, haha.

[JDMLOL]

Odd, I get almost 17 city... most the time, haha.

What do you guys shift at to see those numbers, 2200 rpms?

[jng2985]

What do you guys shift at to see those numbers, 2200 rpms?

skip shift grannies prob.. I can avg 17 city by skipping and being in 6th @ 45+

[JDMLOL]

skip shift grannies prob.. I can avg 17 city by skipping and being in 6th @ 45+

Oh, Ok. If I go anything over like 2500 my avg absolutely sucks. I usually can get in 6th around 40 barely keeping from bogging. I usually only do that if I'm looking for the EPA's rated mileage. Lol.

[DirtyD]

I go 2-6 normally. Shifting around 2000-2100. I usually throw it in 6th above 45, but if I'm going to be going from stop light to stop light, I'll keep it in 5th up to 50

[DirtyD]

Odd, I get almost 17 city... most the time, haha.

I wonder why? Lol

*whiiiiiiiiiiiiiiine* shift *whiiiiiiiiiiine* shift

[merlinmol]

I skip gears (1,2,4,6 or 1,3,5,6), but I get on it quite a bit too. One problem is if everyone here is paying attention to what the computer says, I am typically 4 or 5 mph higher when I calculate it by hand then what the avg shows on the clock. Also, the peeps not running 3.73s should be higher than that.

[JDMLOL]

I tried skip shifting, I don't like the feel when I put it in gear from 1st to 3rd or 2nd to 4th. Going from something low to fairly high isnt very smooth.

[merlinmol]

I tried skip shifting, I don't like the feel when I put it in gear from 1st to 3rd or 2nd to 4th. Going from something low to fairly high isnt very smooth.

You just need to drive a manual trans for longer, that comes from experience.

[jng2985]

I tried skip shifting, I don't like the feel when I put it in gear from 1st to 3rd or 2nd to 4th. Going from something low to fairly high isnt very smooth.

Coppell is filled with soccer mom's, idiots, tourists, and light after light. For the most part I either want to be in front or behind all of that, given the powerband that skipping leaves you with, I tend to avoid doing it. 2-4 and once we're rolling 4th to 6th.. Try just that.. with 3.73's i can land low 17's, but I have to really try.. I'm more of a mid 14 - low 15 driver.

[merlinmol]

Coppell is filled with soccer mom's, idiots, tourists, and light after light. For the most part I either want to be in front or behind all of that, given the powerband that skipping leaves you with, I tend to avoid doing it. 2-4 and once we're rolling 4th to 6th.. Try just that.. with 3.73's i can land low 17's, but I have to really try.. I'm more of a mid 14 - low 15 driver.

That may be why mine does so well, my power band is much different and as long as I'm not on the throttle I'm not in boost. Makes it easier to skip gears all the time. Sounds like everyone just needs to boost their cars :head3:

[JDMLOL]

Sounds like everyone just needs to boost their cars :head3:

One day, when I get my big boy job.

[jng2985]

That may be why mine does so well, my power band is much different and as long as I'm not on the throttle I'm not in boost. Makes it easier to skip gears all the time. Sounds like everyone just needs to boost their cars :head3:

I think I just got a lemon, we should swap parts to confirm :head3:

[DirtyD]

If I do skip shift, I typically go 2-3-5-6. I have 3.55s though

[Midnight11]

i get 35mpg :D

[DirtyD]

i get 35mpg :D

And look gay doing it.

:ryu:

[Midnight11]

And look gay doing it.

:ryu:

and you look gay driving your mustang

[DirtyD]

and you look gay driving your mustang

Sure, whatever you say.

[Grandpa]

and you look gay driving your mustang

Having to sit on phone books to see over the dash will do that.

[03MachMe]

I get around 19 with mixed hwy city. Although my mileage in the mustang has gone down since I got the truck. I guess I tend to get a little throttle happy since I don't drive it every day

[DirtyD]

Having to sit on phone books to see over the dash will do that.
Borrowing your phonebooks really helped, Steve. Thanks again. Too bad you don't have a use for them since you don't drive the car anymore.

[onesick5.0]

Damn all I changed was the a/b and the air filter and I average about 27-28 on my way to Plano and that's passing ppl at 80+....where is it exactly that shawn works on doing the AED tunes?

[DirtyD]

Damn all I changed was the a/b and the air filter and I average about 27-28 on my way to Plano and that's passing ppl at 80+....where is it exactly that shawn works on doing the AED tunes?

Shaun is based in Cali.

[BLK2012GT]

My mpg sucks. E85 FTL!!!!!!!

[Grandpa]

Borrowing your phonebooks really helped, Steve. Thanks again. Too bad you don't have a use for them since you don't drive the car anymore.

You're the type of person who reads the menu for 30 minutes holding everyone else up from ordering but you still order the same thing everytime.