I have a srt6 stock and of course it is no longer covered under warrantee ( exp. 7/4/09), this morning i filled up with 93oct, no problems the rest of the way home, later in the day, i got on the highway, and accelerated hard no problem to 90mph , after a bid of crusing i went to accelerate again onto a differenent highway and there was no power, it downshifted, but still my 98' 1.8l corolla could have done better. I dont think its the gas because its not happening consistant, i spent 1/2 hour getting on and off the a short strech of highway and i had the same results, power down low, but nothing up high speed wise, most of the times, but occasionally it would run fine. I have no lights coming on the dash, car has 27,000 miles and oil change was done at maybe 1,700 miles ago with 0w-40 mobil 1 syn. any idea? past simlar issues? PLEASE HELP!