# Cool thing I found out about Sunoco and Shell Gas **URL:** \ **Category:** SON240sx Automotive\ **Created:** [August 13, 2009, 6:16am UTC](https://forums.speedlife.net/t/cool-thing-i-found-out-about-sunoco-and-shell-gas/127163 "2009-08-13T06:16:08Z")\ **Posts on this page:** 1\ **Showing post:** 76
**Author:** ![ronnie416](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/ronnie416/32/5480_2.png) [@ronnie416](https://forums.speedlife.net/u/ronnie416)\ **Post date:** [August 20, 2009, 7:20am UTC](https://forums.speedlife.net/t/cool-thing-i-found-out-about-sunoco-and-shell-gas/127163/76 "2009-08-20T07:20:37Z")
> [@Good Gas Price!](https://forums.speedlife.net/t/good-gas-price/23612/17): > > Depends on the vehicle. > > S13’s call for “premium” fuel lol > > Then again, I believe premium is referring to 91 as per owners manual. > > Check it out. > > Corvettes require 91 minimum. Stealths, some mustangs etc etc 91 RON equals 86 AKI AKI is what we go by. EG, a 1990 Acura Integra calls for a minimum 91 RON in teh owners manual. That fooled me into thinking it needed 91 on a stock car. I did some reading on it and found out, I only required the regular shitty old gas. Lots of people see 91 or higher RON and assume, and RIGHTLY so. > **[Octane rating](https://en.wikipedia.org/wiki/Octane_rating)** > > An octane rating, or octane number, is a standard measure of a fuel's ability to withstand compression in an internal combustion engine without undergoing pre-ignition. The higher the octane number, the more compression the fuel can withstand before detonating. Octane rating does not relate directly to the power output or the energy content of the fuel per unit mass or volume, but simply indicates gasoline's resistance to detonating under pressure without a spark. > Whether or not a higher octane ... --- _[View the full topic](https://forums.speedlife.net/t/cool-thing-i-found-out-about-sunoco-and-shell-gas/127163)._