before you go flaming me to do a search i already have. which is why i am asking this. i have a 94 lude with a f22b motor. i read a thread on here that said due to the compression differences b/w the stock h23 and the f22b that using premium only was not neccessarry(sp?). ive been using premium since i got the car but the last owner told me he had been using regular without a prob. does it hurt to use premium if not needed? would i gain or lose anything by using regular?