mecsw500
Well-known member
I would wonder that myself, indeed.I believe what many people may be missing in this discussion is the vast difference between a well functioning engine and one that fails. Personally, I don't think prevention of total failure should be the bench mark we shoot for.
If the 20w that XPS and other lubricants shear down to at around 5,000 miles is OK for another 4,300 miles (recommended service interval). Why not spec 20w oil to begin with?
My dealer recommends 5,000 mile oil change intervals. You could say that's just the dealer extracting more money but after a while a good service department that you learn to trust gets to know what works out best from their experiences in real world use. They have years of cumulative knowledge, if they are a decent shop with experienced techs, and I therefore bow to their experience.
I live at 5,000 feet above sea level where the desert sand and dust blows constantly and summer heat is blisteringly hot. So I get my oil changes done at about half the manufacturer recommended intervals at about 5,000 miles as I think my environment can be regarded as "harsh running conditions."
I understand BRP are trying to look good on paper with lower maintenance and servicing costs and I'm possibly wasting money on too frequent oil changes some times, but old habits die hard. I want my engine to do far more than just hold together over its service life.