Should I use premium gas in my older car?
Should I use premium gas in my older car? If you have an older, heavier car, SUV, or truck with high-performance engines and you are experiencing engine knock, try using premium gas for a few fills to see if that fixes the problem, even if the vehicle does not call for it. What gasoline is recommended for an Acura 2009? The 2009 Acura MDX recommends the use of premium unleaded gasoline, with an octane of 91 or higher. What is the octane rating of unleaded gasoline? In the U.S., unleaded gasoline typically has octane ratings of 87 (regular), 88–90 (midgrade),...