I use midgrade because I read on line that regular makes the engine knock because the explosion happens before the piston reaches the top. I get 330+ miles per tank, [city and highway mixed]. next time I fill her up, I will down grade to regular 87 octane and see what I getregular. no need to use anythign else.
ohh...I know =)lower octane can do that. But that also happens because of higher compression engines. IDK what our CR is but I doubt it's high enough to worry about.
I just put whatever is the cheapest at the pump in the car. I get 300/tank on the highway but about 260 city. 1.8L CVT