I have used "SFR" oil additive in my auto's and its a great friction reducer. you add 1 oz per qt of oil. Has anyone used a product like this or like prolong engine oil additive in there honda. I called the SFR corp today and they said yes it can be run in any gas running engine. There site is www.sfrcorp.com for reference. I have seen the 4 ball test on it, and its amazin stuff. I would like to use it for that added protection. More protection the better.