Dearest Pat and Members,
I had used the recommended oil for 28,000 miles then switched to Amsoil. Not much difference, other than shifting was louder with Amsoil. 800 miles ago I filled her with the new Valvoline 4stroke MC oil. So far, I like it best. Vera's motor appears to be quieter and shifting is much smoother with a lot less "clunk" in lower gears. I know that "loud valves save lives", but I like the quiet ones better. I will change it at 3,000 miles since I don't know how well it holds up. But at $3.18 at A-Zone, I don't mind the frequency. My initial response is "Buy It Now". I look forward to any studies done on this stuff, but for now I like it better that the recommended oil. I have always used Valvoline in my current and previous vehicles, since my old Volvo mechanic DEMANDED it. I am not sold yet - my 1980 Ford pickup had 287,000 miles after 10 years and the rear seal went out. Maybe Val--line is not as good as some people say.
Havoline oil was my second choice in the past - never Q'state or P'zoil.
Just Ride Safe!!!
Dennis