Gas - Regular, or higer octane?

You car will run fine on anything with an octane rating of 86 or higher. you do not need to run premium at all, there probably will be only a negligible if any benefits. I tend to stay away from gas brands that I have never heard of but that's just me.

Always should use what's recommended by you vehicle manfactorer suggests as if it needs higher and you use lower you could possibly hear you valves ping or on hills let's say you may hear the pinging and for the vehicles that do require higher octain usally get better mpg's then the lower and equals out in the end