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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
Cam Bearing Failures
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[QUOTE="quadrunner, post: 150815, member: 24190"] [b]SG rating[/b] Exactly my point. SG rating, which preceded SH rating, I believe addressed concerns to longevity of catalytic converters, by removing zinc phosphate. ZP is known to reduce wear on aluminum parts, like plain bearings on some camshafts. Might matter not at all on KTM with its ball bearings. Motorcycle only oils, like Spectro are heavy on ZP additives. I'm going to spend $10/qt on Silkolene Pro-4 15W-50 synthetic. It's my money, and I sleep better at night. Mobil 1 is fine, been using it in cars AND motorcycles for years. But...I did notice air bubbles (foaming) in the sight window using Mobil 1 and other oils. Don't see this with the Silk Pro-4 however. Don't flame me...just an observation. Not saying it's necessarily better. But something about it is different. You can see it in the way it pours, (and the red color.) Anyway, the KTM recommendation was for Shell Advance Ultra 4, which I can't find. Dirt Rider said not to use Mobil 1 in KTM four stroke. THEY recommend Spectro, but said any motorcycle oil, not automotive. So with all this, confusion reins. Everyone has an opinion. Mine is that the Silk Pro 4 comes closest to what KTM states, that I can find. [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
Cam Bearing Failures
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