Damn guys .....we should start a whole new thread on fuel quality. haha!

Theres a technical service bulletin put out by mazda that shows how to test it. Have to see If I can dig it out and share.

I only run shell v-power premium in my acura integra since it has a fresh rebuild with high compression pistons. Ill probably start doing the same with my mighty max. The fuel injectors and fuel pump for the truck were bought brand new but are still several years old just with very low miles. It would probably be a good investment to give them the good stuff.