Conventional oil is refined from crude oil and contains impurities, while synthetic oil is chemically engineered for a more uniform molecular structure. This versatility makes them the recommended choice for the average homeowner who does not want to perform seasonal oil changes.
Step-by-Step Oil Change Guide for Lawn Mowers
This single-grade oil performs perfectly in moderate climates but fails at the extremes. This resistance to "cooking" is vital because air-cooled engines run hotter and are prone to varnish and sludge buildup.
Using a cheap off-brand oil might save a few dollars initially, but it could void a warranty or cause slipping in a centrifugal clutch. Conventional Oil Once you determine the correct viscosity, the next layer of complexity involves the base oil: synthetic or conventional.
Step-by-Step Lawn Mower Oil Change Guide
Using the wrong viscosity or an incorrect specification can lead to increased friction, overheating, and ultimately, catastrophic engine failure. The number before the "W" indicates cold flow, while the number after indicates hot viscosity.
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