- Sep 25, 2013
- St. Louis, MO
I had a discussion with someone the other day and we got on the topic of 87 vs. 93 octane gas. He said that he uses premium in all his cars as the engine will last longer. What a bunch of [censored]. I told that if the manual does not state to use premium, then its use is at best a waste of money. He said that his cars "feel" better when they run premium. Sounds like the placebo effect has kicked in. A few months ago I tried running a couple of tanks of 93 in my Silverado and guess what, no change in mileage or power feel. All I did was waste ~$7 a tank. He did not want to believe me that octane is just a combustion inhibitor. Oh well.