I use Mobil One 4T motorcycle oil for my Triumph, and Mobil One V-Twin for my wife's Sportster. Depending on where you buy it, these oils run 9 to 13 bucks a quart. (I usually buy mine at Wally World for $10/qt.) Full-synthetic motorcycle oil is expensive.
Why so much? Well, it has a picture of a motorcycle on the front, of course!
Why not just use automotive oil? With dino oil it's not that big of a deal; there's not a lot of difference between automotive and motorcycle oil. But you can run into problems with synthetic oil in a bike with a wet clutch (which means pretty much all motorcycles besides BMW and, interestingly, some Ducatis). The friction modifiers in synthetic oils can cause clutch slip. I used automotive synthetic in my Yamaha Virago, but I wouldn't try it in the Triumph. So the oil companies leave out the modifiers in motorcycle oil and give it a JASO "MA" rating. Naturally it costs more to leave something out!
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Today's Featured Article - Product Review: Black Tire Paint - by Staff. I have been fortunate in that two of my tractors have had rear tires that were in great shape when I bought the tractor. My model "H" even had the old style fronts with plenty of tread. My "L" fronts were mismatched Sears Guardsman snow tires, which I promptly tossed. Well, although these tires were in good shape as far as tread was concerned, they looked real sad. All were flat, but new tubes fixed that. In addition to years and years of scuffing and fading, they had paint splattered on
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