I've a quick question which I know has been answered before but can't find the post with the answer I'm looking for... so:
I've been putting in medium grade fuel - 89 Octane - in my sprint. Am I wasting my money - should I be using the 87 Octane fuel? BTW - I now know that different areas of the world use different octane ratings than the USA so really this question is for all you USA readers out there...
Thanks!
