your engine lite will come on after a couple days its just o2s. i also run 1 degree extra timing with good gas. my tuner will check for knock retard. on the hemis i did this and added extra fuel where it was knocking then dynod for 12.5 afr. had a stock class record for the 5.7 non vvt hemi. 12.90@108mph!
Nice!! I hit up Diablosport (before I posted here)...they have not got back to me yet, guess they're backed up from the holiday weekend. Going to adjust the wot fuel now. Just wanted to be clear...did yhou add 1 deg extra timing WHEN you got a good tank of gas?? or you ran the extra degree all the time??? I run 93 oct all the time, but there are some shady gas stations in the area....I try to stick w/Costco, Sunoco, Shell, Exxon.... but I have been caught at Freestate once or twice (prices just look too good!)