Can I Run 91 Octane in My 5.7 Hemi? Here's the Truth
If you're standing at the gas pump wondering, "can i run 91 octane in my 5.7 hemi," the short answer is a resounding yes, but there's a lot more to the story than just whether or not it'll work. You isn't going to blow up your engine by putting premium in it, and you're definitely not going to hurt anything. However, before you start tapping that expensive button every time you fill up, it's worth looking at what your truck or car actually needs versus what just feels like a "treat" for your engine. ...