What gas octane???
Users of the big gassers: Dodge 6.4, GM 6.0, Ford 6.4....... Can the lower octane be used or do you need the higher octanes????? Colorado we have either 85, 87, or I think 91..
Forum Discussion
Octane is an additive that helps control pre-detonation. Normally this occurs in higher compression engines, or where timing is advanced too far, although heat and load can contribute to pre-detonation or "pinging".
If you don't have symptoms of pinging, you are throwing good money away buying more expensive fuel than the manufacturer recommends. If you are hearing pre-detonation you may want to have the vehicle looked at for a bad knock sensor, dirty fuel injectors. It could also be a sign that a valve job is needed.
Typically fueling with higher octane fuel in a car not designed for it will not boost power or provide benefit. I would start with a basic computer engine diagnostic if you are hearing "pinging"
So to answer the OP, put what the manufacturer recommends in the tank.
If you don't have symptoms of pinging, you are throwing good money away buying more expensive fuel than the manufacturer recommends. If you are hearing pre-detonation you may want to have the vehicle looked at for a bad knock sensor, dirty fuel injectors. It could also be a sign that a valve job is needed.
Typically fueling with higher octane fuel in a car not designed for it will not boost power or provide benefit. I would start with a basic computer engine diagnostic if you are hearing "pinging"
So to answer the OP, put what the manufacturer recommends in the tank.
