I have a 2002 F350 V10 with 235000 miles on it, and I have always tried to run the higher octane gas. Just wondering if that was a waste of money? Thanks Rich
I run 87 octane in my V-10. I had a tank of non-ethanol 91 octane from my TH I needed to use up. I put it in the truck and did see a performance increase enough to notice the difference.
I make dang sure I only put in non-ethanol 91 fuel in ALL my small engines, anything that sits a while between use. The price difference is negligible.