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Old 27 February 2009, 16:57   #1
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Synthetic oil, slick 50 and Yamaha?

Is synthetic oil okay to use in a Yamaha F80 4 stroke and has anyone used slick 50 (or similar additives) in an outboard.

I don't have a manual and would be grateful if someone could let me know what Yamaha suggest, or your experiences.


Many thanks,
Tim.
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Old 27 February 2009, 17:41   #2
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Don't touch slick50 or similar with a barge pole. I have seen inside engines that it has been used in and the gunk that builds up is horrible.

I don't see the point in synthetic oils either. They are good if you don't plan on regualr oil changes. I would rather a normal oil and change it a bit more often.
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Old 28 February 2009, 04:36   #3
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use the genuine Yamaha oil,
have done for years, and it certainly gives good piece of mind.
Never had a problem
never use any additives
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Old 28 February 2009, 08:48   #4
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If you search the internet you will find the Slick 50 parent company were found guilty in the US for mis advertising/desription on the box and had to set aside $26m to cover compensation.

Pete
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Old 28 February 2009, 09:36   #5
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Quote:
Originally Posted by Blizzard View Post
use the genuine Yamaha oil,
have done for years, and it certainly gives good piece of mind.
Never had a problem
never use any additives
Any good quality engine oil will do - do you use Honda oil in a Honda or Ford oil in a Ford???
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Old 28 February 2009, 10:13   #6
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note if you use syntic oil once you are stuck with it. I understand that you cannot revert to ordinary oil if syn oil has been used in a engine.
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