Guys,

I know this is weird and might be psychological, but I observe that everytime I park my car, later on use it, the fuel gage decreases about 1/15 of the tank capacity, as if it's losing fuel as the car sits. My mpg is really bad, about 18 mpg city and 22 mpg highway.

It's a GSR with t3 turbo, tuned to 14.7 AFR below boost and 12.5 on boost, high flow cat, stock exhaust, compression test 200 across, clean air filter and all regular maintenance.

1. Is it the gage problem? I doubt it cause when I fill the tank after reserve light comes on it's 10 gal and accurate.

2. I smell no gasoline fumes anywhere, on the tank cap, engine bay, no leaks.

Help? My eye still has 20/20 last time I checked

 

help

 

this is why you keep track of gas mileage

 

keep in mind that it will change based on whether or not your car is level. Also 14.7 is rich for part throttle cruising that might contribute to your problem