Mobil 1 claims the red cap is safe for bikes with wet clutches (though they recommend their MC specific oil of course). Most Motorcycle specific lubes with have a high ZDDP as well, to provide a better barrier lube in the advent of heavy torque/hp to Displacement. No clutch problem, just the shifting got noticably notchey. But I did run Delo 400 for about 1500 miles in my 02 Triumph and the last 500 miles the shifting quality went south pretty fast. That being said most diesel oil's do not have friction modifiers as well.
You may or may not have problems using a regular car oil in your bike. I would avoid motorcycle specific blends as many are remarketed versions of car oil, so for the price you might as well get a group IV synthetic.įYI, Motorcycle specific oils do not have friction modifiers that could mess with the wet clutch operation. I've read good things about Rotella and Delvac but only 2nd hand info. I'd use either Amsoil 10w40 or Mobil 1 15w50 whichever is easier to get. There are quite a few that use dino oil of varying types, and a lot of confusion about when to start running synthetic, which oil (of any variety) is best suited for this motor, etc. Most of us have been using Mobil One red cap 15w-50, both in the older SJ formulation, and in the newer SL "syuper syn" variety without problems. Those coffee can sized pistons produce a lot of carbon. The motor runs at RPM's less than 5600, but with very high piston speeds due to the stroke length. It has a huge dual pin crank, and square cut gears. The jugs, gears, and very large wet clutch all share the same oil supply. It has a very long stroke, and cylinder walls coated with Nikasil (silicon carbide in a nickel substrate). The VTX is a water cooled V-Twin, with an 1800cc displacement.
So, I'm hoping a few of the knowledgable posters here, will share their thoughts with me. There has been considerable discussion about this topic among the VTX community, and having read most of the articles here, I can see there's a lot of misunderstandings there as well. I've been reading the many posts here, and am hoping some of the more learned posters can give me their recommendations for a unique bike, Honda's VTX.
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