Black oil after 250 miles? - Kawasaki Ninja 300 Forum
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post #1 of 9 (permalink) Old 04-20-2019, 12:20 PM
CVJPMG
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Black oil after 250 miles?

About 250 miles ago my we did an oil change on the bike with a new filter and it was the usual brown. Just a short while later the oil looks pretty black but not sludgy. It was dropped so maybe that stirred up something in the pan? Or is this normal?
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post #2 of 9 (permalink) Old 04-20-2019, 01:17 PM
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How many miles on the bike?
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post #3 of 9 (permalink) Old 04-20-2019, 01:36 PM
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post #4 of 9 (permalink) Old 04-20-2019, 02:36 PM
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Flaming debate material, but I bet you broke it in nice and easy according to the manual. The rings don't seat as well that way and then you have blow-by of combustion products, making your oil darker, not to mention a little lower compression than usual.

In any case, not too big a deal. I wouldn't worry about it. Ride your bike and enjoy it. Having dark oil doesn't mean your oil is broke down and not doing its job lubricating your engine.
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post #5 of 9 (permalink) Old 04-20-2019, 05:07 PM
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Just a side note. I've been riding nothing but motorcycles straight up for the last 13 years and I have never let anyone do my oil change. My landlord had some rules change and I had to let someone else at a bike shop change it and they used a 50/50 and two weeks later that oil went black. So, that has never happened I've always used the expensive synthetic and it stays red for a significant period Of time and all that aside you could just get a engine flush kit, and change to a better grade oil. I always recommend people stick with synthetic even though I am a firm believer that oil is oil is oil. If you are running a 300 then you are running at Double the RPM to achieve any power unlike most bikes, therefor running hotter and your spark gap could be a little wide you may want to check that. like the last poster said just ride it and enjoy if you don't hear engine noise and it's not overheating it's still doing its job but if it bothers you just flush it out and put some better grade oil!
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post #6 of 9 (permalink) Old 04-21-2019, 04:53 PM
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It does seem odd though, that after 8500 the oil "turns black" after 250 miles.
Was the oil the correct grade?
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post #7 of 9 (permalink) Old 04-24-2019, 04:34 PM
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10w-40 motorcycle oil, no abnormal noises or anything just the color. It stirring up some gunk when it fell over is probably the best bet
post #8 of 9 (permalink) Old 04-25-2019, 05:35 AM
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Quote:
Originally Posted by CVJPMG View Post
10w-40 motorcycle oil, no abnormal noises or anything just the color. It stirring up some gunk when it fell over is probably the best bet

Could be.
Hope that's all it is.
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post #9 of 9 (permalink) Old 04-25-2019, 08:49 PM
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Yep, I put some of that Lucas Oil Treatment in one of my engines on this old old car and I think the gunk in the engine was the only thing holding it together it started making hellacious noise. Anyways I got a lot of muck out of the engine. I also did an oil flush treatment on an old Harley and got unbelievable amount of crap out of it.So having a dropped bike knocked some stuff loose for sure.
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