A lawn mower needs engine oil to run smoothly. Oil is essential in lubricating and cooling the constantly moving parts. However, you need to use the right oil for your engine type. So, can you use 10W30 in a lawn mower?
Yes, you can use 10W30 oil in a lawn mower instead of SAE 30. 10W30 is a multi-grade oil formulated for both low and warm-temperature conditions. It’s great for fuel efficiency, adequate engine protection and smooth, noiseless operation.
Can I Use 10W30 in a lawn Mower?
Although most lawn mower manufacturers recommend SAE 30 oil, you can also use 10W30 oil which has great performance in high and low temperatures. This engine oil guarantees the protection of the engine, fuel efficiency, and smooth operation in varied climatic conditions.
10W30 is a multi-grade engine oil engineered to possess the properties of two different viscosity-grade oils. That is SAE 10W weight oil under 32°F and SAE 30 weight oil at 212°F. This means 10W-30 oil can survive at temperatures as low as -13°F and as high as 86°F.
The numbers before the ‘W’ in a multi-grade oil represent the oil’s winter-grade viscosity. That is the rate at which oil flows when temperatures drop. The lower the number, the better it performs in cold temperatures.
The numbers after the ‘W’ represents the oil viscosity at high temperature, and the higher the digits are, the better the oil performs in hot temperature conditions.
Why use 10W30 oil instead of SAE30?
SAE 30 oil is only rated for warmer viscosity; when the temperature drops below 32°F, this oil will have a harder time flowing through the engine parts. Commonly applicable to older engines, you must change engine oil to lighter grades when cold temperatures set in.
However, modern lawn mower engines are now designed to use multi-grade oils like 10W30 that offer protection from temperature swings. For this reason, you need to use 10W30 oil if operating in cold or hot conditions.
Additionally, this lubricant will offer the following benefits:
- Reduced oil consumption in your engine
- Greater fuel efficiency and use
- Better sludge control in the engine
- Reduced wear and tear of engine parts
- Adequate protection against rust and corrosion
- Smooth and noiseless operation due to greater viscosity
Is 10W-30 a Synthetic Oil?
10W-30 oil comes in conventional, synthetic, and synthetic blend variants. Naturally, 10W-30 synthetic motor oil outperforms all other variants at normal operating temperatures. However, this synthetic motor oil is expensive compared to other varieties.
Conventional motor oil is cheaper than other variants but breaks down faster and becomes unstable at higher temperatures. Synthetic blend 10W-30, on the other hand, shares similar properties with synthetic variety, but it’s slightly less expensive.
More importantly, do not use low-quality oils in your lawnmower, as they can easily damage or weaken your engine. When buying engine oil, always pay attention to the API (American Petroleum Institute) seal, which acts as proof of quality.
Which Oil Can I Use Instead of 10W-30?
There are several types of oil working under different climates. Instead of 10W-30, you can choose one among the following motor oils to use in your lawn mower:
- SAE 30: Engineered for warmer temperatures. It is the most common oil for small engines.
- Synthetic SAE 5W-30: Best protection at all temperatures, improved starting with less fuel consumption.
- SAE 5W-30: Formulated for very cold temperatures.
- Vanguard 15W-50: This applies for varying temperature ranges and/or continuous use, such as commercial lawn cutting.
Why you should check and change your lawn mower oil
You should always check and change your lawn mower engine oil. By now, you know how important oil is to the life of any combustion engine. Oil usually acts as a lubricant and, simultaneously, as a coolant. Without refreshing the oil, the life and performance of your engine will decrease.
Engine oil should be replaced at least once every season – spring or summer or after every 50 hours of use. And for a new lawn mower engine, you’ll need to change the oil after the first five hours of running. Use the recommended oil by the mower manufacturer.
With time, engine oil breaks down and, at the same time, becomes very dirty. This makes it lose its cooling and protection abilities. In this state, failure to change the oil will significantly damage your engine.
How to check your oil level?
It’s also risky running a lawn mower without enough oil. When changing the oil, you must ensure it gets to the right level. This is simply done using the provided dipstick. To check your lawn mower oil level:
- Park the lawn mower on a flat surface, turn off the engine and disconnect the spark plug cable to prevent the engine from accidentally starting.
- Remove the dipstick cap, apply some pressure and twist counterclockwise to remove the dipstick.
- Once you’ve removed the dipstick, wipe it with a clean rag before reinstalling it so that the reading will be accurate.
- When reinstalling the dipstick, ensure the teeth on the cap match the grooves on the dipstick tube.
- Reinstall the dipstick by applying some pressure and twisting clockwise to fit the dipstick cap.
- Remove the cap and view the oil level towards the dipstick blade’s bottom.
- The oil level should be between full and add marks on the dipstick.
- If the oil level is low, pour a few ounces at a time to avoid overfilling and allow enough time to settle before rechecking the oil level.
Lawnmowers come in different oil needs based on engine sizes and climatic conditions. Your owner’s manual will likely specify the oil type, but 10W30 oil can be used in any 4-stroke lawn mower engine. This is the right lubricant for mowing in hot or cold regions.