Yes 10W40 is probably too thick for a new engine. But also, 0W30 is too thin for a 100k+ engine (in a climate which rarely sees <-5 and very rarely sees -10). I was running 0W40 Mobil 1 but was only getting 12psi oil pressure at tickover and 30psi at 2000rpm at normal temp (WIS says should be 40psi min).

What happens if oil is too thick?

Using oil that is thicker than recommended may lead to a decrease in fuel economy, a higher load on your engine, and even a shorter life for your engine. Conversely, using thinner, lighter-weight oil than recommended can cause excessive wear and shorter life.

Is 10W-40 thick?

While both are low-temperature grade oils, 10W40 is thicker at high temperature; therefore, better to use in warm weather. This article provides tips for using SAE 10W-30 and 10W-40 and covers viscosity grades. Read on to determine which is better between these two motor oil variants.

What is the difference between 10W 40 and 5W 40 engine oil?

The main difference between the two oil types is that one is thinner than the other. The 5W40 is thinner than the 10W40 at lower temperatures. On the other hand, the 10W40 motor oils are thicker than the 5W40 oils for good reasons. This oil type works pretty well in lubricating engine parts during startup.

Related Question Is 10W-40 too thick?

Is 10W40 OK for 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.

What is 10W-40 oil?

10W-40 10W-40 is the engine oil which offers a 10 weight performance in the cold starting temperature. On the other hand, it provides a 40 weight performance at the normal operating temperature of the engine.

Is 10W40 synthetic?

Semi-synthetic oils such as 10W40 have long been the standard. Their base is refined crude oil, which is then blended with additives.

Which oil is thicker 5w40 or 10W30?

Characteristics of 10W-40 Motor Oil

10W-40 is a bit thicker than 5W-40 but is still rather thin and works well to lubricate the moving parts of an engine during start-up. This oil's number "40" means it will be a little thicker than average while exposed to the heat of a running engine.

When should I use 5w40 oil?

5w40 is better for starting your engine at low temperatures as it flows more easily in this environment. When the engine is running and hot, the differences are negligible; 5w40 and 10w40 both have high viscosities and are equally effective in protecting against engine wear.

Is 10W or 5W thicker?

A 10W oil thickens more than a 5W. The other number indicates the oil's resistance to thinning at high temperatures.

Does 10W40 hurt 5w30 engine?

Your vehicle does not use 5W-30 oil. The recommended oil viscosity for your vehicle, according to Kia documentation, is 10W-40. If you drive the vehicle in exceptionally cold weather, well below 32 degrees, you can use 5W-30 oil but even 10W-40 is still perfectly OK to use if outdoor temperatures are below freezing.

Does 10W30 hurt 5W20 engine?

Modern cars are designed to use lower viscosity oil ranges, so they can properly lubricate ( see attachment) Going from 5w-20 to 10w-30 should cause no harm for one oil change. But if you engine as designed for 5W-20, give it 5W-20.

Is 10W30 OK for lawn mower?

Lawn Mower Oil Types

10W30 is a common motor oil grade suitable for many lawn mowers. Your owner's manual will tell you the exact grade required, but in almost all cases 10W30 is the right stuff for a four-stroke engines. Any brand of oil that's suitable for cars or trucks will work fine in your mower.

Can I mix SAE 30 with 10W40?

You can mix single weights like SAE 10 and SAE 30 or multigrade like 10W30 and 10W40.

What is 20w40 in engine oil?

For example; 20W-40 is an SAE grade where 20W (Winter) is 20-weight/viscosity of oil for colder temperatures and 40 is 40-weight or oil viscosity at low temperature.

Does oil get thicker or thinner when hot?

Motor oil gets thinner as it's heated, but to prevent it from getting too thin at higher temperatures, additives (viscosity modifiers) are used so that it behaves like a thicker grade oil at higher temps. The lower the first number, the better the oil will pump and flow at cold startups.

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