Originally Posted by Yorksail00

I tend to trust the engineers who build these engines over a bunch of clublexus dudes. Personal preference. If you want to buy a $100k vehicle and skimp on fuel, get worse mpg and slightly lower HP, knock yourself out. I tow too much to **** and moan about 91-93 octane recommendations.

Originally Posted by hankinid

I tend to trust 91 to 93 octane, ethanol free. Towing or not towing.

Originally Posted by Yorksail00

I tend to trust the engineers who build these engines over a bunch of clublexus dudes. Personal preference. If you want to buy a $100k vehicle and skimp on fuel, get worse mpg and slightly lower HP, knock yourself out. I tow too much to **** and moan about 91-93 octane recommendations.

Originally Posted by z32

Higher octane, when under load (especially when towing), will less likely cause engine knock...due to the detonation timing. normal driving you probably won't notice much...maybe u get to drive further distance when using higher octane fuel. To me, I always put in premium.... 30 cents / gallon diff each time 17-18 gallon fill up cause a diff of $4-5, to me the diff in price is absorbable. Similar speaking, some ppl say you can put in 5/30 regular engine oil...despite the manual says 0/20 syn.... I only put 0/20 every oil change on 5k interval though.