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RLS7201
Beautyful Downtown Gladstone, MO
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Joined: 10/26/2002
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Gary45 wrote:RLS7201 wrote:Air cooled engines run hotter than water cooled engines. Thus the manufacture does not recommend multi viscosity oils. BUT! that ruling was for non-synthetic oil. Standard oils loose their multi viscosity capacity when run to hot and thin out. So when running multi viscosity oils in air cooled engines, always use synthetic oil. I have the same generator as you and have used 10W-30 synthetic for 22 years with no problems.
Richard
Regular multi viscosity oil is fine in an air cooled motor, air cooled motors do not have a thermostat to make them run as hot as water cooled motors. There are no air cooled car or motorcycle engines anymore because they cannot get them to run hot enough for modern fuel injection pollution control systems.
Onan strongly resists multi viscosity oils in the 7K NHM air cooled generator.
Obviously you have no understanding of the additives that make 10 weight oil multi viscosity. Those additives break down in small air cooled engines and leave you with 10 weight oil.
The reason for water cooled motorcycle engines, is because the higher compression engines don't cool well enough with air. You have it backwards.
Richard
Richard
95 Bounder 32H F53
460/528 stroker
Web Master
MWPSchooners.com
First brake job
1941 Hudson
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Gary45
Oshawa, Ontario, Canada
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Richard, when I used to have air-cooled motorcycles I could come to stop on the highway and put my hand on the fins, the only time they ever got very hot was idling in traffic, no cooling fan
The water cooled bikes now get extremely hot all the time.
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Gary45
Oshawa, Ontario, Canada
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https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwix2-f-vtj3AhUjAp0JHedMBGwQFnoECDQQAw&url=https%3A%2F%2Fwww.thorforums.com%2Fforums%2Ff8%2Fwhy-cummins-onan-does-not-recommend-synthetic-oil-23430.html&usg=AOvVaw2CtbD3ncBwae5MIazeZiCG
Link to Cummins Onan re oil
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