Black'03GT said:Mobil/Exxon only. I don't trust the cheap gas
Brisk281GT said:Shell, I just throw it on the Shell card. I use 89 on the stang. I used to use premium (91) but I have heard from some that it is not good to use the higher octane fuels unless timing is incresed. So I just use a midgrade. Anyone have any input?
I always use 89 octane atJason94gt said:Chevron
I've had more than one reliable mechanic at ford dealerships tell me that higher octane shortens the life of 02 sensors.Brisk281GT said:Shell, I just throw it on the Shell card. I use 89 on the stang. I used to use premium (91) but I have heard from some that it is not good to use the higher octane fuels unless timing is incresed. So I just use a midgrade. Anyone have any input?