Difference Between SAE 30 vs 10w30: Which is Better?

SAE 30 vs 10w30
SAE 30 vs 10w30

SAE 30 oil has a viscosity rating of 30. A motor oil usually has a rating between 0 and 50. viscosity means how much the oil itself can resist flow.

The most common oil for use in lawn mower engines is SAE 30, but the safest choice is to follow the manufacturer’s recommendations.

Difference Between SAE 30 vs 10w30

On the other hand, oils with SAE 10W30 thickness at low temperatures and SAE 30 viscosity at high temperatures are usually described as SAE 10W30. Generally, SAE 10W30 is an oil whose viscosity is SAE 10W at low temperature. The viscosity indicates how difficult it is for the oil to flow. And, on the other hand, SAE 30 is for high temperatures. Winter is represented by the W. It is common to use lawn mowers with motor oils as well, such as 10W-30 or 10W-40.

Therefore, SAE 30 and 10w30 are both different and have different uses.

Different Usage of SAE 30 and 10w30

Oil plays an important role from a small liquid-cooled engine to a heavily loaded motor vehicle. If you want to make the best possible oil choice for your lawn and garden substore or any other engine, there is no better option than straight 30 grade and 10W30 grade as they provide a similar grade 30 performance. On the other hand, SAE30 is relatively inexpensive and has fewer additives, for which people love it.

Both SAE 30 and 10W30 lubricants are useful for a variety of reasons. This is due to its thickness, which can be used any time of year. In addition, a wide range of temperatures can be handled by the 10W30.

The following are sectors in which SAE 30 and 10w30 are used:

Engine Oil

Older engines can be run with SAE30, while modern ones can run with 10W30. Also, the SAE30 is ideally suited for use in warmer climates, while the 10W30 can be used in a wide range of temperatures and is also suitable for colder climates.

For engine oils, you may use synthetic 5W30 or 10W30 oils in all temperatures. Compared to conventional oils, synthetic oils offer superior protection for small engine vehicles. The oil requirements for your engine will vary depending on the temperature you operate at. You should use SAE 30/SAE 10W-30 oil on most mowers and in most climates. Rather than the SAE30, the 10W30 offers better cold-weather starting AND is better for varied temperature ranges.

ISO Oil Measurement

Two different scales are used by SAE and ISO to measure viscosity. This is equivalent to ISO 32, ISO 46 and 68, and ISO 100, as SAE 10W is to ISO 32, SAE 20 to ISO 46, and SAE 30 to ISO 100. As well as straight weights, you can mix multiple grades of lubricant as well, such as SAE 10W30 and SAE 30W40. The summer is a great time for your straight 30.

Motor Oil

Motor oils designed for small four-stroke engines such as lawnmowers, generators, and other 4 stroke lawn and garden equipment are usually S.A.E. 30W (nondetergent). A 30w-50 oil will be much thicker at colder temperatures than a 5w-30. Also, the viscosity of the oil varies with temperature, so a 5w-30 will be thinner at colder temperatures.

Lawn Mower Engine

Any lubricating oil with a straight 30 density will perform precisely in lawn mowers, tractors, and push mowers. The SAE 30 oil is suitable for a standard 2 cycle air-cooled engine. Modern four-stroke engines, however, have a dilemma with conventional SAE 30 oils that lose viscosity during cold cranking. For a heat-sensitive engine to function at low temperatures, it must use viscosity grade oil. The right motor oil for them is SAE 10W30.


The viscosity of 30 works best for SAE-30 oil at warmer temperatures. However, 10W30 motor oil will help the engine start when it is cold. With SAE 10W30 motor oil, the viscosity is maintained at lower temperatures, making it a logical choice. Performing at 100°C, SAE 30 oil provides similar performance to SAE 10W30 oil. The Mobil 1 SAE 10W30 oil is used to replace Straight 30 oil in many engines.

Pressure Washer Pumps

Pressure washer pumps specifically require SAE 30 oil. In addition to preventing excessive friction caused by excessive wear, this type of oil will help your pressure washer pump to operate smoothly.

Alternatively, 10W30 is not recommended for pressure washer pumps, but it can be used if temperatures fall below 40 degrees F. You should use the 10W-30 oil to help your power washer start more smoothly.


In place of 10W30 oil, SAE 30 is perfectly fine, provided that the oil is kept at a temperature no lower than 50 degrees Celsius. The meaning of this is as follows. The oil in your car flows properly when it is at a normal temperature which means 100 degrees Celsius. The oil is less slippery when it cools down to 25C or thereabouts.

The Main Difference Between SAE 30 and SAE 10W30

It is the viscosity grade that distinguishes SAE 30 oil from SAE 10W30 oil. Motor oils are categorized in SAE by giving a numerical code that specifies the grade number of the oil. The oil performance and qualities can be determined based on this code.

Depending on the number of grades, the oil is either single-grade or multigrade. The first is a single-grade or mono-grade oil, while the second is a multigrade one with multiple digit codes. Alternatively, there is a multigrade oil intended for use before and after W.


Make sure you use your engine’s recommended oil grade to keep it running smoothly. Any motor works better with oil than without it, as oil not only runs the engine but also lubricates the interior functions. It is therefore important to always ensure your car, lawnmower, or any other vehicle you own which has an engine is using the right type of oil.

Leave a Comment