Re: What Type of Oil Do You Use?
I've been using automotive full synthetic oil in my motorcycles since it was invented. I've never noticed any clutch problems, even in my 145 hp VMax with 38,000 miles on it's clutch. I use synthetic instead of dyno oil because it smells better and can handle high heat better. I live in Las Vegas and it gets HOT out here. Sometimes, very rarely, I'll use full synthetic motorcycle oil but it costs 3 times as much and doesn't do anything any better than any other oil that I've used.
I use 40 weight oil. I don't care about the 5W, 10W or 20W part of the oils viscosity because that's the oil's weight at 32F (the freezing point of water) which we don't see here in Vegas very often. My car has an oil temperature gauge and at startup in the garage it's oil temperature is between 45F in the winter and 98F in the summer.
I never ride my bike until it's warmed up at least 2 minutes, even in the summer time, more in the winter. I never run it to high rpms untill at least 5 miles are on it. So the oil is never cold when I rev the engine. In my car I wait till the oil temperature is 175 or higher before I rev the engine but my current motorcycle (Ninja 500R) doesn't have an oil temperature gauge so I don't know what it's oil temperature is. I have had oil temperature gauges on other bikes and it takes 10 miles for the oil to reach maximum temperature (I don't remember what that temperature was but in my car it's 214F).