Fresh oil prevents the accumulation of acidic byproducts and moisture that can damage the engine during months of inactivity. If the oil is dark, gritty, or smells burnt, it is time for a change, regardless of the mileage, as degraded oil loses its protective properties.
Troy Bilt Lawn Mower Oil Grade Guide
While the temptation to use cheaper, ethanol-heavy fuel at the gas station is strong, the ethanol attracts moisture, which corrodes metal components and degrades fuel lines over time. Too much oil, however, creates pressure in the crankcase and can cause the engine to burn oil, leading to smoke and fouled spark plugs.
Never pour old oil down drains or into the ground, as it can contaminate soil and water sources. Locate the dipstick, usually found near the engine block, and wipe it clean with a rag.
Troy Bilt Lawn Mower Oil Grade Guide
In the fall, after the last cutting, conduct a quick oil check to ensure the level is still correct heading into the storage period. Reinsert the dipstick fully, then pull it out again to get an accurate reading.
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