When it comes to choosing the best gas for a push mower, there are a few factors to consider. The first and most important thing to keep in mind is that you should always use a clean, fresh, unleaded gasoline. This ensures that your mower’s engine runs smoothly and efficiently.
The minimum octane rating you should look for is 87 AKI (anti-knock index) or 91 RON (research octane number). This is commonly referred to as 87 octane gasoline. Using a higher octane fuel is not necessary and won’t provide any additional benefit to your push mower.
It’s worth noting that if you live in a high altitude area, you may need to use a different type of gasoline. At higher altitudes, the air is thinner, which can affect the combustion process in small engines like those found in push mowers. In such cases, it is recommended to use a higher octane gasoline to compensate for the lower air density. Consult your mower’s manual or contact the manufacturer for specific recommendations for high altitude operation.
Another consideration is the presence of ethanol or MTBE (methyl tertiary butyl ether) in the gasoline. Many gas stations now offer gasoline blends with up to 10% ethanol, commonly known as gasohol. This blend is generally acceptable for use in push mowers. Additionally, gasoline blends with up to 15% MTBE are also acceptable.
However, it’s important to be cautious when using gasoline with ethanol, as it can potentially cause issues if left sitting in the mower’s fuel system for extended periods. Ethanol can absorb moisture from the air, leading to phase separation and the formation of deposits that can clog fuel lines and carburetors. To minimize these risks, try to use fresh gasoline and consider using a fuel stabilizer if you anticipate storing your mower for an extended period.
In my personal experience as a gardening and landscaping expert, I have found that using a high-quality gasoline from a reputable gas station is always a good choice. Cheaper or lower-quality fuels may contain impurities or additives that can negatively impact the performance and longevity of your push mower’s engine. Therefore, it’s worth investing in a reliable brand of gasoline to ensure optimal performance.
To summarize, the best gas for a push mower is a clean, fresh, unleaded gasoline with a minimum of 87 octane/87 AKI (91 RON). Gasoline blends with up to 10% ethanol or up to 15% MTBE are acceptable, but caution should be exercised when using ethanol blends to prevent potential issues. If operating at high altitudes, consult your mower’s manual or contact the manufacturer for specific recommendations. Using a high-quality gasoline from a reputable gas station is always a wise choice to maintain the performance of your push mower’s engine.
