nrmedic
Well-known member
I’m a habitual changer too, 3-5k tops. Debating the QSFS Euro 5w40?540Ratblog?
I've been running QSFS too, and those that know me are a little shocked. I was pretty loyal to another oil for a few years.
I'm happy enough with it, but my Blackstone reports have shown a little lower viscosity after 3000 miles (my typical oil change interval) than I would have expected. But everything else looks great.
Supposedly a fantastic oil for antiwar characteristics. Fundamentally what matters most?
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