Did a quick test last night to see how fast the fc was going through gas. Emptied the gas tank completely, poured in roughly half a gallon of 87 octane and let it idle at exactly 1k. It took right around 23 minutes for the engine to die, is that about right for an n/a 13b? I know rotaries aren't notorious for high gas mileage but this seems a little too low. I only let it idle because i dont have insurance on it YET so i cant drive it around :/

 

Depends on year/model. I'm getting about 13, with a slightly modded S5 TII. I should be getting 16/24 according to theFAQ. 17/25 for a S5 manual, 17/24 for auto and, like I said, 16/24 for turbo.

 

i average around 270 to a full tank so i get about 16.8 miles to gallon
stock s4 no mods other than a straight pipe

 

Unless your tank is very clean it is probably not a good thing to rely on the bottom of the barrel to run your car off of as there is often too much gunk and impurities sloshing around the lower depths of the tank which could clog up the fuel sock, fuel filter and so on.

 

Um, how big is your tank?

I get about 180 to a full tank and that calculates out to ~15mpg.

'88 GTU (S4 N/A)

I believe a stock tank is like 13gal, max. My "full tank" is usually a 12 - 12.5 gallon fill.

 

I'm getting about 230 0r so on a full tank of gas. And thats with some slight modifications.

 

s4=16.6 gal
s5=18.8 gal
mine:
auto vert=~19mpg, maybe 17 or 18 with the a/c on.
s4 turbo= ~250rwhp 23 highest tank average. usually 20-21.

 

I used to get 400 out of my 18.5 gal S5 tank.

 

My gauge must be off, then.

 

15.5 on the last tank.

 

I've never done a scientific test, but 'not good' is my answer.

 

Nine.

 

+1

i have a 00 ford explorer that's a family car i fill it up twice a week with about $40+ each time

a 92 Honda accord that's my dd i fill it up once a week with about 25$

and my s5 n/a... well I'll keep my eye on the gauge every time i pass a gas station

don't expect more then 20mpg. it's not a honda

 

i just checked mine this morning.

26 mpg is about what i get.

but bear in mind i am in the perfect setup. i go 1 block then drive north for 22 miles at 55 mph right to work. then back home everyday.

 

I drive a brand new Focus everyday and i get about 39 mpg in that baby.
But my FC is constantly doing what my avatar shows, and I honestly dont bother recording my mpg because its dreadful. But while highway cruising its not that bad.

 

 

S4, To4b Hybrid Turbo @ 10psi 680x1000cc inj, var. res. bypassed walbro.

I've figured about 13mpg city driving with some quick 2nd gear pulls. About 160mi to 12 gallons Still leaning it out... slowly...

 

In my t2, if I can manage to stay out of boost, I'd do around 16~18 on the street, when I drove the car home from LA to Sacramento, I did around 23~25 mpg cruising

minior mods, modified stock air box (holes cut in it so you can hear the bov more, switching over to a hks intake filter soon), dp 2.5 - 3 inchs, crappy apexi exhaust, fcd and I have a cat with emissions fully intact

but my civic hx blows my fc out the water when it comes to MPG

 

(0_o)! . yeah this one was rebuilt very well just recently, 13k miles on the new engine. hopefully il be getting something halfway decent like 20-25 when i start daily driving it lol.

 

maybe 10 on a good cold day

 

8-9 mpg beating the hell out of it and 28 on the hwy going ~75mph.
If my haltech had sequential injection Im sure I could do better on the hwy.

23min for a half gallon seems a bit much but then again I dont know what stock idle afr is.

 

i got a 87 tii with rb turbo back front mount and intake and on all highway i get about 26, and around town i get around 19 if i drive economical prolly around 15 with spirited driving

 

bout 8 spirted
16 hwy cruising @ 70

aggressive streetport/no emmissions/hybrid 60trim/fmic/255 walboro/ 550 720/ rtek 1.7/ rev2/ 3in intake/ heavy and wide 18in wheels

I love boost/love gas stations and love premixing

 

With my old set up (intake, rev II exhaust, walbro 255) I would get about 14-16 but I do minimal freeway driving so that is on the low side. Now with the new set up I am hoping for better mpg but i am expecting worse, if that makes sense.

 

i am going to estimate 10MPG. 550/1300 twin turbo/untuned. anyone behind me will faint from the fumes.