Tested out the whole mpg thing

[JonJon]

Dont look bad. Did you get a print out in 100rpm intervals? Thats the only type I really care about when I dyno, graphs to me are just eye candy.

I guess you just have a heavy foot.

I've been waiting for the guy who organized the dyno day to put up my graph. His website has the break down per every 50 rpm but after a few email attempts he keeps saying "soon"

Stock I only got ~19 mpg mixed. I babied the crap out of her when I first got her since I learned to drive stick on her.

 

[Mach1Run]

my 97 v6 used to get a little almost 300 per tank in the city and i could stretch it out to 350 to 360 on long hiway trips like from texas to alabama, however i doubt my GT will do as well ... but that may be because I seem to have trouble keeping my foot off the gas lol.

 

[MiTyCubone]

223miles/tank max i ever got, living in san francisco!

 

[StangLou]

Sat I made the treck to VA for the Fun Ford Weekend Event. I filled her up, reset the odometer and when I pulled in yesterday to fill up I had 358.2 miles on the clock and it took 13.26 gallons to fill it up. This put me at 27.013 miles per gallon for my trip. This was probably around 80/20 hw/city driving.

 

[huesmann]

Pullies help, timing adjuster helps but you need to run premium, i have heard aftermarket intakes help and if you free up your exhaust that helps too.

Well, isn't the point of increasing your mileage to save money? You gotta increase your mileage by over 10% in order to even break even on the fact that you're using premium instead of regular.

 

[huesmann]

u get 50 mpg?? thats insane

I think you need remedial math lessons.

 

[02mingreyconv]

I drive only 5 miles to/from work twice a day, which is not very good for your engine/gas milage. I still get between 240-260 miles to the tank (I fill her up when the light goes on).

This is not excellent, but I did not buy my stang to get good gas milage

Joe

 

[DeadLurker]

I recently got 24.4mpg on a long highway trip. I was pretty impressed.

 

[rpburnette]

why would more hp = better gas mileage. if you have more power over the entire power band it's going to use more fuel if you drive at the same RPMs. even if you drive at 1500 rpms, and you have more power, it'll use more fuel and you'll get worse mileage.


oh, I got 25 mpg (231 miles/9.13 gal) from Rockville, MD to the last rest stop on the NJTP (Vince Lombardi). I avg'd 23mpg for the whole 450 mile trip. I've never gotten above 23mpg until that first leg of the trip. I was using my AC too, since my sister was with me and my car with the windows down and exhaust is too loud for people to talk. so AC'd.

The reason that you could possibly get better gas mileage even with more power is in the way the car is driven. If you drove the car on the highway only, with no stops and at the same exact speed, no acceleration or deceleration than you would get better mileage with certain modes that made your car more efficeint(intake, exhaust, chip). The reason this works is on the highway going the same speed(say 60). Your car only needs a few Hp(about 10-20Hp). It only needs this to overcome tire friction and wind resistance which stays the same if the mods are only power mods and not aero mods. However, in the city when you accerate which is where the gas is mostly consumed the power mods could swing either way. If you are in stop and go than the mods could hurt, b/c like you said more power/rpm during acceleration = more fuel. There isn't a real sure fire answer. It has too many variables to calculate just on mpg.

 

[redlined50]

Well, isn't the point of increasing your mileage to save money? You gotta increase your mileage by over 10% in order to even break even on the fact that you're using premium instead of regular.

what are our cars designed to run on? I'm sure they are set really low so if you get some bad gas there will not be detonation so i bet you could still run low grade gas if you only bump it up a couple degrees

 

[DJsZincGT]

u get 50 mpg?? thats insane

Where did you get 50....it equates to 25.66

 

[Black_Cobra]

I see some interesting claims in this thread. Everyone knows how the ECU and the MAF and other sensors work in combination to keep the air fuel ratio reasonable, right? Keep that in mind when theorizing what mods will improve mileage. Anytime more air passes the MAF the ECU sends an order for a proportionate amount of fuel.

 

[uk01gt]

My 5,000 miles over the last 2 months have resulted in a rolling average of just under 25mpg, ranging from 20 to 29. Mainly motorway. That's in a bone stock 4.6 GT auto.

 

[GregGTStang]

I think everyone who says that they get 20-23 mpg in just the city is BS'ing. I didn't buy this car to get good gas mileage. I'm just asking how these people claim that they get 23 mpg in the city.

 

[geegee]

I don't know how anyone says that they get 300+ a tank from driving in the city. It seems to me it can't happen. I didn't get on the gas once the whole tank, and I got 245 miles. What, if any, mods can help me get better gas mileage? IMO, if you mod your car, more hp=less mpg. If anyone has a mod that gave them better gas mileage, who also tested it out, let me and anyone else know that wants better gas mileage.

City mileage can't be determined in one tank of driving. It has to be a long term average mileage. There are too many driving factors that influence city mileage: how much time did you spend in traffic, at stop lights, etc. If there are twenty traffic lights on your way to work, you'll not get the same mileage as someone who only has five, even if you drive the same distances, at the same speed, and with the same gentle touch on the accelerator pedal.

Never leave a traffic light with it in your mind you have to get ahead of the other guy rather try to make the transition from standing start to cruising speed as genteel as possible. The brake as little as possible when approaching a red light, try to time traffic lights so you roll through on the green, etc. Starting up from dead start consumes a lot more fuel than rolling through at 5 mph. Repeat your good driving habits over and over and soon the mileage will creep up. The downside of this is Honda owners will think you're a grandpa and love teasing you.

 

[rconaway]

The 2 quickest and easiest things you could do is to drop a K&N air filter in the car along with Mobil 1 synthetic. That should be good for another mile or 2 per gallon, especially on the highway. On cars with clogged filters, I have seen 7-8 mpg on the highway. After that, make sure you car is tuned up, keep maximum air pressure in the tires, make sure your air-conditioner is charger properly, change the fluid in your tranny if you have an automatic, etc... All of these things will combine to reduce your fuel economy. When I got my mustang with the vortech on it, I used to get 27-28 on the highway and 18-22 in the city, assuming I kept it under 2500-3K rpms. Once the s/c kicks in, i have seen as little as 7.5 mpg as the absolute worst case but most times between 15-17.

 

[FruitNCrunch]

I think you need remedial math lessons.

nope, sometimes im just burnt out. like this morning for instance. last nite was crazy lol

 

[FruitNCrunch]

Where did you get 50....it equates to 25.66

its the summer, i dont feel like sitting here at my computer doing math to find out what mpg some other guy gets. but maybe thats just me.

 

[69fb00GT]

I see some interesting claims in this thread. Everyone knows how the ECU and the MAF and other sensors work in combination to keep the air fuel ratio reasonable, right? Keep that in mind when theorizing what mods will improve mileage. Anytime more air passes the MAF the ECU sends an order for a proportionate amount of fuel.

This statement is correct...on the intake side. ON the exhaust side...freeing it up CAN (notice i said can) help achieve better mileage. Better exh manifolds will help to scavenge the exhaust more efficiently...(read: completely) This doesn't really apply to any exhaust after the headers. The best way to achieve more efficient exhaust scaveging is to work on the exhaust ports on the heads.


As far as mod's that increase your fuel mileage....i've read (haven't personally witnessed) of people increasing their fuel mileage when switching to synthetic fluids. Do an internet search and see what you come up with.

 

[69fb00GT]

And i've posted my fuel mileage b4...but i'll do it again..

city average: 21

best highway: 28.4