My car is tuned to run premium. The guy at the gas station decided to put some regular in (about 4 gallons) before i noticed and reminded him that i meant premium, not regular, the other 9 gallons were premium. Do you think the car will be alright or should I get some octane booster?

 

Just drive it easy until you can topp off with premium.

Rich

 

well i drove it about 50 easy highway miles right now, so that sound help, i think ill top off around 100 or so. thanks for the tip man.

 

Don't worry about it.... the loss of octane is minor (~91 vs 93, if that's what your premium is), the cold weather means you need less octane, and if all else fails the knock sensor will retard timing to prevent any engine damage (assuming you didn't have it programmed out). No need to add 100-octane.

 

yeah, the temp gauge on the car gets about halfway to the first notch, it runs extremely cool with the headers + 160 thermo, i guess knock wont really be a problem.