Can I use 40W instead of 30W?

Pressure. Thicker, 40W oils increase the oil pressure of the engine by their very nature, as opposed to the lighter, more flowing 30W oils. But, lighter, more flowing oils cause less dry-running in the engine, and therefore less wear and tear.

Can 10W-40 be used instead of 10W-30?

If you were to put 10W40 in an engine designed for 10W30, the “thicker” oil would lead to friction in the engine and an increased load on the oil pump. The car would have to do more work to get the oil around the engine block.

Will 10W40 hurt my lawn mower?

SAE 30 motor oil is commonly recommended for use in a lawn mower engine, but the safest best is to use the type of oil your lawn mower manufacturer recommends. Often 10W-30 or 10W-40, the same motor oil types that are used in vehicles, can also be used in a lawn mower.

Can you mix 10W40 with SAE 30?

No. SAE 30 is a single viscosity motor oil. Only multi viscosity motor oils only should be used in any car.

Is SAE 40 better than SAE 30?

SAE 40 has a higher viscosity, so it is thicker than 30 at all temperatures. Viscosity is not a specific thickness, but rather a curve of temperature vs thickness. They are both single grade oils and are not common now. Mostly used in single cylinder 4 stroke engines for generators and lawn mowers.

What is the difference between 10W 30 and SAE 30?

Much the same as on account of contact between moving solids, the Viscosity will decide the energy needed to make a liquid stream. SAE 10w30 oil has 10w thickness at low temperatures, but SAE 30 is at high temperatures. As SAE 10w30 is not thick in low temperature, while SAE 30 is in high temperature.

What uses 10W-40 oil?

This oil weight is commonly used in diesel engines or in a smaller motorcycle engine too. The 10W-40 oil viscosity also often serves as an alternative for older engines with burning or oil leaking issues. Why is that? The 10W-40 engine oil has a thicker viscosity than, say, 10W-30 oil when the car engine is hot.

What is the difference between 10w 30 and SAE 30?