Anyone using ultra 93? Opinions if it's better than 91? Thanks.

Jon

 

I have used both. Have not noticed any difference. I think performance wise it will be the same

 

I use 87. Car goes like hell and mpg is great.

 

Anyone else use 87?

 

I've gone down to 87 after my first 2000 miles. My car feels like a guzzler (typically

 

Use Premium. 91/93. It'll be used the same.

On a regular stock car, you'll want to use 91/93 since that's what the car was designed to burn. You will get ideal performance and gas mileage while using premium, and you'll extend the life of your catalytic converters since fuel will be burned properly. When you don't use the intended fuel, the car dumbs down the ignition timing.

 

Not another gas thread....