Coupe Questions

[95mustangv6]

Ok I just got my car 2000 Gt Black 5speed back monday from the dealership they put a new motor in cause the last one throw a rod at 56k. although the service engine soon light is on it seems just fine.I thinks its my o2 sensor.Now i was wondering what type of gas u guys run in your car. I alway put 93 but my mechanic said 87 would be god till i get more mods.Currelty have bbk cold air,bbk tb 70mm, granatilli 80mm MAS flowmasters and 3,73s.Does any of your guys car idle Werid cause mine will go up and down and some times shut off. it doenst do it alot but i didnt no if might need to buy a chip and get a tune. Thanks shane

 

[merc123]

I have an 03 and I use 87. It is recommended you use the minimum amount of octane to prevent detonation and pining. If you ping at 87 then use 89, etc.