Merc 5.0..... use same oil as car?

bluemarshboater

Petty Officer 2nd Class
Joined
Jul 6, 2009
Messages
118
Just wondering and can't find any info on this here. Do boat engines require a different oil (viscosity) than cars? Must I use a marine engine oil?

Thanks
Dave
 

bluemarshboater

Petty Officer 2nd Class
Joined
Jul 6, 2009
Messages
118
Re: Merc 5.0..... use same oil as car?

Maybe I can ask this here without starting a new thread.....

I started to pump out my oil yesterday to find what seems to possibly be water in the oil. The oil is a bit thin and brownish. I bought the boat without a test drive..... when I looked at the boat and checked the dipstick all looked and smelled fine, as it did right before I started to pump it out. The little bit of oil on the plugs (I know, not good) looks normal. The running of the engine without a load seems fine and I know that really means nothing.

I guess my question is..... is it possible that the oil hadn't been changed for quite some time, broke down and the water could be from condensation?

I'm taking it out Saturday with fresh oil. I'll stop every now and then and check the oil to see if the level rises and/or the color changes.

Best
Dave
 
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