ok im stumped i have no clue why it did if yall have any ideas 97 gst spyder 85k miles just had a new clutch put in and i only run super or perimum grade fule HELP!!! from 300 miles per tank to 250 per tank

 

Could be your driving style...

The quality of the gas can also effect it. Sometimes a gas station can get a crappy batch.

 

don't fret too much. a lot of factors play a role in gas mileage. outside heat, humidity, of course driving style, gas, and let me ask why you buy the expensive gas?

 

b/c hes got a GS-T and it requires premium.

 

outside heat and humidity shouldnt be causing him to lose 50 miles per tank

 

im getting better gas mileage with costco gas then with chevron gas lol

 

i dont drive that hard outher that when i go to the track or some one talks **** to me about my car so its not to offten but i will fig it out if it is still doing it in a few tanks ill get my fule systen checked out

 

oh it could..... Fuel is used to cool the camber as well as create the explosion. with hotter air flow in the worse your car runs.

other than that what mods all together are on the car? did you put on that exhaust yet because that stuff untuned will kill your mileage

 

no i have not put it on yet its got my intake and a new clutch the exhaust comes in on tuesday and how would i tune the exhaust

 

you can only tune with something like an SAFC or DSMlink ect ect. the exhaust wont make a huge difference I wouldnt worry about the gas mileage on it after the install but it will make your car run a little rich. Main thing is tuning.

My EVO stock was only getting 200ish miles to a tank in not a little less if I drove hard. now I have a bunch of mods but after tuneing with my SAFC I can go 260 to a tank on city driving and the highest I got was 300 on easy highway(from FL to Ma) on average when I drive hard it will get me aleast 250 minimum if not better now