Do not make the mistake of assuming you know what type of fuel to enhance your lawn mower. If you use the wrong type, you can do harm to your mower’s engine, and sometimes, you could invalidate your guarantee. The mower’s owners manual must outline the specific recommendations to your model, but generally speaking, mowers utilize high quality unleaded gas or a fuel-oil mix.

It Depends on the Engine

Most four-stroke engines need new unleaded gasoline with an octane rating of 87 or greater. It’s possible to use gas with ethanol, but over 10 percent ethanol is generally not recommended. Mowers with lookup engines utilize that same type of gas, but with the accession of a high-quality two-cycle motor oil. The proportions vary with manufacturer, but in Briggs & Stratton two-stroke mowers, for instance, the proportions are 50 parts gas to 1 part oil. Another important point to notice: If you’re going to be saving your mower for over 30 days, add a fuel stabilizer to a full tank of gas. This will keep the gas from breaking down and damaging the mower’s engine and carburetor.

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