What's YOUR Current Gas Mileage?

[DahnAE92]

Just thought I'd start another thread off a random topic that popped into my head.

360 miles off a full tank of gas with my GT-S, mostly in-town driving. So that's what? 30mpg?

~30mpg with the following mods:
*Spectre Cone Air Filter (off stock intake setup w/ MAF adapter)
*Fart can muffler (off stock exhaust, lulz)
*Lucas Oil and Transmission conditioners #
*SuperGunk Clutch Fluid #

(# not really mods)

Pretty sure it's twelve gallons per tank up to the resevoir/fill hose.

Share your Empeejeez!

[BigNazty114]

i usually fill up with 9-10 gallons at a time and I always reset my trip odometer. In my SR5 this usually goes with about 230-250 miles of stop and go traffic, i can get up to 300 miles of highway driving just about.
So about 23-26 mpg city and about 30mpg highway

This is a bone stock SR5 automatic with a carb'ed 4A-F. And it isn't the greatest but a HUGE upgrade to driving my ported-rotary turbo FC3S everywhere.

I'd love to have a 4A-FE at least, but hey, it does it's job. Getting full exhaust done and trying to do a few things here and there to stretch mileage a little bit.

[SuperRA]

I get 25-30mpg mixed driving in my GTS with a 90' smallport.

[DahnAE92]

I think I'm going to go with a full cat-back from HKS, Flowmaster Cat, and a new OEM manifold once I get the $700 it'd take for all that. Then that Cosmo Racing intake kit with an HKS turbo filter on it. Also gonna get the timing and valves/seals replaced/tuned and shoot for 40mpg average. If I'm lucky.

[SoGosu]

Stock 88 SR5



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[SuperRA]

Originally Posted by DahnAE92

Pretty sure it's twelve gallons per tank up to the resevoir/fill hose.

Published capacity is 13.2 gallons, and I pretty sure that's not all the way up to the filler hose. So I'd guess your putting in at least 14 gallons, maybe more?

I calculate my MPG this way:

1. Fill up at the pump till it clicks off
2. Reset trip odometer
3. Drive regularly until I need gas again
4. Fill up at same pump till it clicks off
5. Read amount of fuel (gals) dispensed from the pump readout
6. Read total miles on trip odometer
7. Divide miles/gals. VIOLA your MPG

I believe that is the most accurate way to calculate without extra instruments or mods.

I'm sorry but I think you'd have to be very very very lucky to get 40MPG, but doesn't hurt to try!

[eage8]

I used to get between 35-40 mpg with my 4A-F and stock sized tires.

with my 4A-GE 20V and 205s I'm down to around 25-28 mpg.

[eage8]

Originally Posted by SuperRA

I'm sorry but I think you'd have to be very very very lucky to get 40MPG, but doesn't hurt to try!

I've done it, it's not that hard, you just have to drive like a grandma.

I have a friend that used to get 44+ on his 4A-F.

[toyotaspeed90]

0.... there's no engine in the car...

that or it could be read as infinite..... since we did push in the driveway and that resulted in no usage of gas....


before I pulled the motor I was getting right around 30mpg, mostly highway use, in my ae92... smallport 4age, on 4afe electronics.

I could get 40mpg on the same setup if I was driving over 90mph everywhere....

[SuperRA]

Originally Posted by eage8

I've done it, it's not that hard, you just have to drive like a grandma.

I have a friend that used to get 44+ on his 4A-F.

But he has a 4AGE right? I've babied the throttle on my 4AGE, the best I've gotten was low 30s.

[eberbs1]

4AF
Fart cannon
Pod filter

I get about 10KM per L and about 28M Per G and about 400km per tank ($40 in gas).

[BigNazty114]

Things I've noticed about my car, since it is an automatic 4A-F, the city mileage is much lower than I could get it with a standard. 3 gears to accelerate means having to go into higher rpms on each of them than having 4 accelerating gears. But the overdrive on the auto keeps RPMs almost a full 1000 lower than the manual's fifth gear, so highway mileage is better

[toyotaspeed90]

Originally Posted by SuperRA

But he has a 4AGE right? I've babied the throttle on my 4AGE, the best I've gotten was low 30s.

try driving faster..... there's more to fuel economy than how slow the engine is driven. there's peak efficiency ranges of the engine and the car & anything on/in the car.

for instance if you have wider than stock tires you are running a higher resistance against the ground.... takes more power to keep the car at that steady speed.....


and if you don't believe me about slow vs. fuel economy try driving at a constant 5mph... and see how far you get on your tank then try again..... (not that this is practical... but anyone who says "well... 50mph is slower meaning your engine is turning over slower which means that you'll use less gas than at 60mph" as a blanket statement is an idiot).

Keep in mind that the reason that highway driving will yield you better gas mileage isn't necessary related to what rpm's you're at. It has more to do with how much power is required to keep the car at a constant speed vs. how much power is put out at that throttle percentage/rpm range....

[SuperRA]

Originally Posted by toyotaspeed90

try driving faster..... there's more to fuel economy than how slow the engine is driven. there's peak efficiency ranges of the engine and the car & anything on/in the car.

for instance if you have wider than stock tires you are running a higher resistance against the ground.... takes more power to keep the car at that steady speed.....


and if you don't believe me about slow vs. fuel economy try driving at a constant 5mph... and see how far you get on your tank then try again..... (not that this is practical... but anyone who says "well... 50mph is slower meaning your engine is turning over slower which means that you'll use less gas than at 60mph" as a blanket statement is an idiot).

Keep in mind that the reason that highway driving will yield you better gas mileage isn't necessary related to what rpm's you're at. It has more to do with how much power is required to keep the car at a constant speed vs. how much power is put out at that throttle percentage/rpm range....

Yea, I agree mostly with this. I didn't necessarily mean by babying it that I lingered in acceleration not gaining much momentum. I like to punch it, rev it, and hear the 4AG sing, so my "babying" is more a normal driving to someone else. There is an upper limit though, for example, you can't go 120mph and expect to get 50MPG. There is a point where drag force requires a lot more engine power to overcome since it increases exponentially with velocity.

All other outside factors held constant, gas mileage, or usage, is directly related to the injector pulse width. That is a direct relation to how much fuel is used. In general P.W. increases with RPM although not necessarily linear. So in a sense, RPM can be related to MPG. For a given speed, say 50mph, say you have two choices, 3rd gear and 4th gear. Say 3rd gear will result in 5K RPM, and 4th gear with give you 4K RPM. It is pretty safe to say that 4K RPM will use less fuel because the P.W. will be shorter for 4K than it would be for 5K. Therefore, you would get higher MPG in 4th gear vs. 3rd.

So I guess what I'm saying is, yes, MPG isn't necessarily related to RPM, but yet it isn't necessarily NOT related to RPM. Yes a blanket statement would be wrong, there are more factors that need to be taken into account.

Oh so BTW, what kind of MPG do you get from a 4AGE ina corolla?

[BigNazty114]

i did not mean to suggest that RPM is the defining factor of MPG. But if two identical engines are maintaining 55mph-70mph easily in their power ranges, the one staying at a constant 3k RPM would probably be using less gas than the one at 3.8k RPM. Not by much. but noticeable after driving a considerable distance on the highway for sure.