Im still a newbie to this site but from reading the posts, I learned quite a bit. Ever since I bought my 2000 Intrepid, 2.7V6 Last July, I used Valvoline Synthetic and I use 89 and 93 octane fuel, yes 89 when I am budgeting. The car runs like a champ, excluding the annoying intermittent chime on the airbag light, (plan on taking it to a dealer soon for that).Are there any more tips you can provide before I start with my mods? I also replaced my stock rims with the same size because I read a post on the tranny.