Just started using Valvoline 20w50 motorcycle oil from walmart for the last 2 oil changes and the fram oil filter. I have an old 1998 Honda Shadow ACE tourer. My wife and I just got back from a ride through Michigan (around the thumb) and down through Canada through Niagra Falls and back home to Bloomington In. (2015 Miles)The bike has 33,000 miles on it, I could'nt tell any difference in performance other than loaded down over the Castrol GTX I use to use. I did add a little bit of oil during our trip but there was a lot of extended 65-70 mph periods.