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Buell Motorcycle Forum » XBoard » Buell XBoard Archives » Archive through August 01, 2008 » Black Oil, Already « Previous Next »

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Boney95
Posted on Friday, July 25, 2008 - 11:43 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

The skinny; I brought the bike in for it's 1,000 mile service and had them put Syn3 in the engine. Well only after 600 miles or so, the oil is all ready black. I figure the Syn3 inter-mixed with the Dyno oil a bit (of course). But Im also thinking that they did a •••••• job on draining the Dyno oil. Reason being, they overfilled the oil tank, thus making me think they didnt completely drain the Dyno, thus more than wanted Dyno oil is mixed with my Syn3. So, I guess what Im asking is should I change out the Syn3, or can I be safe by waiting until I up the bike up for the winter. At 2,000k now, figure I'll run another 1,500-2,000 before winter.
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Prof_stack
Posted on Friday, July 25, 2008 - 11:45 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Change it.

The piece of mind will be worth it.
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M1combat
Posted on Friday, July 25, 2008 - 11:46 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

I'd certainly change it again at about 2500...

But I would do that regardless of the current condition of the oil. It would be to get that second wave of particles out asap.
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Ft_bstrd
Posted on Friday, July 25, 2008 - 11:50 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

There's still a lot of crap running around the crankcase at 1,000 miles.

I wouldn't freak out about it, but if it makes you feel better about it change it.

I would change it at 2,500 miles regardless.
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Werewulf
Posted on Saturday, July 26, 2008 - 06:44 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

the black, is just the oil doing its job...if you use oil with low detergents, it will stay cleaner longer, but your motor wont...my bud just had his black synthetic oil annalized after 5k miles and it was good..dont worry about the color...
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Mbohmann
Posted on Saturday, July 26, 2008 - 09:04 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Don't worry about the color. The oil should be fine. If it will help you sleep at night, change it again at 2K miles. Learn to do it yourself and you'll know it is done right. Even at $5 a qt., oil is cheap insurance.

A note on oil analysis. I've done it for many years at work, diesel bus engines. Analysis is a trending tool. If you're going to do it, do it every oil change. Then there's a baseline to compare subsequent samples to.
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Reepicheep
Posted on Saturday, July 26, 2008 - 09:58 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

I've personally done my oil change right (drain completely from the drain plug, change filter) and had to pull it again after a few hundred miles for whatever reason, and it changes to black *fast*.

I can't remember the bike or the reason I did it... but I seem to recall that less then 500 miles is enough for it to go black.

I think two things happen with oil that make you have to change it. First, it has a limited amount of contaminates it can keep in suspension. These are what makes it black. It also slowly breaks down and looses it's ability to hold together and lubricated (resist shearing, it has to hold together in one really thin but really big film to lubricate).

Of the two, I think it almost always starts breaking down before it looses its ability to carry "stuff" until you can change it, particularly in an air cooled motor.

When I got my bike, I did a 250, 500, and 1000 mile change on the oil anyway, FWIW. a 500, 1000, and 2000 change interval probably makes as much sense.

I also never drain the oil out of the lines and oil pumps... from a percentage standpoint, it is minor, and it seems like trying to get that oil out of there has a lot more opportunity to hurt something then help it.
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