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My oil problem

3369 Views 16 Replies 12 Participants Last post by  MNStryker26
So I had around 2000 miles on the bike and decided to swich to full synthetic. The only motorcycle oil (4t) I saw at the time was
20w-50. So I bought that at 10.50 per quart. changed the oil and filter, started up the bike and it ran like crap. Its was knocking and pinging like crazy. I let it idle for a few minutes and it got a little better so I took it out for a few miles. It knocked the whole time. It did settle down after 30 or so miles but every time I let it cool it knocked again every time I started it back up. Long story short I went back and got some regular 10w-40 4t oil, changed it again and it ran like a dream. I think maybe the engine wasnt broke in enough for the full synthetic oil. or maybe 20w-50 was just to heavy of an oil. Either way I'm gonna stick with regular stuff for now.
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I just did my first oil change an I used Castrol conventional 10W-40 and it seems to be running smoother than whatever was in it factory. I pushed the initial change a little too far I think, about 1,000 miles. The color of the oil was sure a heck of a lot better then what my roommate took out of his 08 Sportster-Nighster. I am pretty sure he maybe has changed the oil once since he bought it. Riding temps vary from 35-105 F.
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