GriffbsXX Posted April 18, 2004 Share Posted April 18, 2004 Not to start an argument or another oil war, just wanted to find out what viscosity I should be looking at for the bike. 10W-40 or 15-50? What's the difference? 10 vs 15 not 40 vs 50. Thanks for the input. Byron Quote Link to comment Share on other sites More sharing options...
velocity Posted April 18, 2004 Share Posted April 18, 2004 If you are doing a lot of riding in the cold you'd probably want a thinner oil. But since you live in CA (probably don't need to worry about COLD starts) I'd say go with the thicker oil. Quote Link to comment Share on other sites More sharing options...
tomek Posted April 18, 2004 Share Posted April 18, 2004 15w-50 is just to thick for water cooled four.Kills hp too. Quote Link to comment Share on other sites More sharing options...
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