What type of oil should I use in my Jonway?

by Jacques Drouet
(Gladstone, OR. USA)




I own an NST mfg'd by Jonway 50cc QMB139 engine. no owners manual, inspection tag says oil-10w40 so I use Castrol as in everything. Castrol says no! Been running Castrol for 1500 miles.

What oil should I be using? Never behind in oil changes 620 miles

Thanks in advance




Comments for
What type of oil should I use in my Jonway?

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May 16, 2010
Oil NEW
by: Anonymous

I use 10W40 four strokes synthetic in my 150cc Jonway. I have about 25,000 miles on my engine. No problems as of today.

Feb 18, 2010
Good Oil NEW
by: Jim Zeiser

Do not use synthetic until 1,000 miles, first. Second, most of us say 15W-40 is best, after that 10W-40. It supplies the best viscosity for a high performance engine.

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