does it matter if i put regular vs higher octane gas into a 4cylinder engine? my buddy tries to tell me that it doesnt matter for any engine below 3.0l v6. i know in my truck, the engine runs completely different when i have 89 octane

 

87 octane or higher. It won't make a difference.

 

That's a relief, I thought you were complaining about the aftermath from dinner

There are as many schools of thought about this as there are "experts". My thoughts? If the engine is designed for 87 octane (and it shows no tendency to detonate), use 87 octane. Anything higher is a waste. My reasoning?
1) All octane ratings (87 thru Sunoco Blue 96 and higher) use the same detergents
2) All octane ratings (87 thru Sunoco Blue 96 and higher) have uniformity of rating between brands
3) Octane is a number assigned to the Fuels ability to forestall detonation. IE: A high(er) octane rating is required for high(er) Compressions.
4) Octane, by it's nature (and it's job) burns slower as the rating rises. That's right, 96 burns slower that 87. So putting 96 in a car designed for 87 might show a power loss, rather than any improvement !!

P

 

LOL LOL LOL ............AHY AHY AHY P u r something else... LOL LOL

 

Yeh, who would'a thought. "Expert" Automotive advice and Stand-up Comedy at the same time. All without a cover charge!
What a deal.

P