What grade gasoline can I use in a 3300. I was told I had to usemarine grade gas. The instructions jsays gasoline. In short can I use gas fr my car?

You can use normal fuel in Your Generac. You cannot use high alcohol fuels E20 or E85. I usually buy 91 octane fuel for all of my small engine applications, however this is not necessary.

A User Manual can be viewed via a link at the bottom of the page in the Guides & Documents section of the product page in order to help you determine if this product will suit your project needs.