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Whats everyones opinion on using high performance and synthetic oils for running these older 2 cycle outboards any pros or cons i was thinking about trying some lucas semi synthetic smokeless oil but wanted to check with the pros first ….
James
can’t harm except the wallet but you can try some xd-100 Evinrude It contains decarb elements for the ETEC generation outboards.
Joining AOMCI has priviledges 🙂
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So long as it is designed for liquid cooled two stroke or outboards good to go should not hurt. However if it is two stroke oil for chainsaw, weedeater, moped, dirt bike or other air cooled allocation bad things will happen. Both are two stroke oils but have very different properties.
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To add to point about liquid cooled (TWC) oils, they burn more completely at lower temps and leave less ash than air cooled oil, which relies on engine temperature to burn off the solids.
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I began experimenting with synthetic oils in 1975.
I had been into dirt bikes for about 10 years. At the end
of the season there would be enough piston slap that
the cylinder would need boring and the piston replaced.
I had always used Yamaha Lube at the factory
recommended mix. I believe it was 32 to 1 but
it was a long time ago.
I bought a new 1975 Yamaha 400 MX. A guy at work
was selling Amsoil. At that time they only offered this
100 to 1 two cycle oil. I still have a little of it left. I
would mix up 5 gal. at a time. 6.4 oz would have been
exactly 100 to 1 but I would add 7 oz to my 5 gal.
can to be sure I had enough. I ran that bike for 3 years
and never put a piston in it. I mostly have pre WW-II
motors. Because of this experience I still use a full
synthetic and have greatly reduced the amount of oil I
run in my motors without any failures.
Its been over 45 years ago that I first tried a synthetic
and conventional oil has vastly improved since then.
Still none of the friction modifiers today provide the
the lubrication qualities of a synthetic so adding some
synthetic to conventional oil can give you the benefit
without the cost. The reality is that most of these
motors don’t get enough hours on them to make enough
difference between a synthetic, or a blend, compared to
a good conventional oil manufactured today.
My comments on conventional oil is my opinion.
My statements about using a full synthetic are my experience’s.
This not a recommendation. Use your best judgment.
Tubs
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