Gas Type

[rjwool]

Fuel says 91 or above. Is it a must to use 93? I live in Texas. I have heard that high octane fuel only matters at high altitude. Forgive me in advance if this is a dumb question.

 

[NDanecker]

Its actually the opposite. At higher altitude air is less dense so AFR is richer thus less concern for pre-detonation. You can run 87 or 85 at higher altitudes and motor will pull timing if it senses detonation. You won't get full power but honestly its not needed if you are not towing or not pushing boost near limit. Drive conservative, stay out of boost and you can do just fine with the cheaper lower octane fuel especially at elevation.

 

[gram10]

Its actually the opposite. At higher altitude air is less dense so AFR is richer thus less concern for pre-detonation. You can run 87 or 85 at higher altitudes and motor will pull timing if it senses detonation. You won't get full power but honestly its not needed if you are not towing or not pushing boost near limit. Drive conservative, stay out of boost and you can do just fine with the cheaper lower octane fuel especially at elevation.

I'm not sure how the factory tune on this truck works, but some tunes will increase boost pressure to meet mass air flow targets. On an N/A engine your statement is true, but that may not necessarily be true for a turbocharged engine

 

[RAM-Ranch-MT]

oh god another gas thread SMH. RUn 91, end of story. Thread done. Good lord. This horse has been beat.

$85k 3.0 liter twin turbo performance truck, RUN 91