- Joined
- Apr 28, 2012
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- Ram Year
- 2010 Hemi Reg Cab 4x4
- Engine
- Hemi
from SAE publications...
A higher octane quality fuel used in premium-recommended vehicles has the potential for delivering better acceleration and power. Octane number is a standard measure for the anti-knock quality of a gasoline fuel. A higher octane number fuel can withstand more compression before detonation (or knock). Higher compression ratios directly correlate with engine power and thermodynamic efficiency. Hence engines that are designed for higher octane or premium grade fuels should typically develop higher power by extracting more from the calorific value of the fuel.
Our trucks are tuned for 89, as stated before 87 I had no idea what I was missing. My first tank of 91 and it was night and day, just as highlighted in this SAE article. Once in a while I do 87, and the truck goes right back to being sluggish.
A higher octane quality fuel used in premium-recommended vehicles has the potential for delivering better acceleration and power. Octane number is a standard measure for the anti-knock quality of a gasoline fuel. A higher octane number fuel can withstand more compression before detonation (or knock). Higher compression ratios directly correlate with engine power and thermodynamic efficiency. Hence engines that are designed for higher octane or premium grade fuels should typically develop higher power by extracting more from the calorific value of the fuel.
Our trucks are tuned for 89, as stated before 87 I had no idea what I was missing. My first tank of 91 and it was night and day, just as highlighted in this SAE article. Once in a while I do 87, and the truck goes right back to being sluggish.