I don't think they are selling very many two cycle power mowers any
more. Two cycle oil is the stuff you mix with the gasoline.
While I suspect you need standard four cycle, it depends on the mower.
The manual should tell you, if you lost that check the model number of go to
the Sears web site, they may have an on-line manual.
On Tue, 20 Apr 2004 14:56:23 -0400, "albert smith"
Is it a Briggs and Stratton motor? If so it's a 4 stoke engine
that can use either straight 30 weight oil or 10w-30.
Use straight 30 weight if the engine never gets below 40
degrees F on start up, or 10w-30 if the engine might get
started at a temperature below 40 degrees.
A straight engine oil is preferred because it's less likely to
leave deposits upon break down.
As others have said I expect you have a 4-cycle engine which uses oil in the
crankcase. The owners manual will usually specify a 30 weight oil
I found several years ago that air cooled engines are an application where
synthetic oil really shows it's stuff.
I recommend 5W30 Mobil 1. Don't let that 5 weight number concern you. That
is the viscosity of the oil at 32F. At that temperature it is still thicker
than 30 weight when it gets to operating temperature of 212F. (all oil get
thinner as they get hot). With an air cooled engine you can see
temperatures higher than that. Another advantage of synthetic is that it
does not thin as much when it gets hot and therefore does not need the
viscosity improvers to make the multi-grade.
If you bought it new, it came with an owner's manual which should say what
oil is recommended. If you don't have an owner's manual, asking what oil is
like saying "how far is up?"
What brand of engine does it have? Is it a 2-cycle? (doubt it), a Tecumseh?
Briggs & Stratton? Honda?
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