Always check the freshness of the fuel; if it has been sitting in the tank for more than 30 days without a stabilizer, it should be drained before use. For the vast majority of small lawnmower engines, regular unleaded gasoline with an octane rating of 87 is the standard recommendation.
Small Lawnmower Fuel Oil Guide: Choosing the Right Gasoline and Oil
Some manufacturers may recommend specific ethanol limits or provide unique formulations for their equipment. This fuel, often labeled as "pure gas" or "non-ethanol," is typically found in small engine-specific cans at hardware stores or marine fuel stations.
Synthetic Oils and Two-Stroke Engines It is important to distinguish between the fuel and the lubrication required in two-stroke engines. E10 gasoline contains up to 10% ethanol and is generally considered safe for most small engines manufactured after the early 2000s.
Small Lawnmower Fuel Oil Guide: Choosing the Right Gasoline and Oil
This separated ethanol is highly corrosive and can damage the aluminum components of the engine. The Dangers of Old Fuel and Phase Separation Even with the correct type of oil, fuel degrades over time, leading to significant starting problems.
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