Quick Answer: Which Is Better 10w40 Or 20w50?

What is 20w 50 oil used for?

SAE 20w-50 Oil – Conventional & High Mileage A SAE 20W-50 motor oil is typically used in older vehicles or in particularly warm climates.

Castrol GTX 20W-50 has been specially formulated to help extend the life of your engine by keeping it free from sludge, even when operating in extremely high temperatures..

When should I use 10w40 oil?

Overall the 10W30 will be the more appropriate oil for cold weather and non-performing engines while 10W40 is perfect for warmer temperatures and older vehicles.

Can I mix 10w30 with 20w50?

It’s allright. Don’t worry, won’t hurt anything. You can mix various oils, be it brands or weights or multi-grades. The one slightly higher weight multi-grade will hardly change the other characteristics of the 10W-30.

Should I use thicker oil in summer?

As a general rule, you’ll get the best protection in the summer when you use a slightly thicker grade of oil, such as a 10W30 instead of a 5W30. Engines need a thicker oil in the summer months because of the summer heat and its effects on thinning the oil out.

Is Thicker oil better for older engines?

A: Yes. This is a practical method to improve oil pressure in an older, high-mileage engine. The slightly thicker oil film from the heavier base weight oil — 10W — can help protect worn engine bearings as well.

What oil is best for older engines?

When you’re choosing the best oil for older cars or high mileage engines, there are several criteria you can look at.Pennzoil High Mileage Conventional Motor Oil. … Castrol GTX Part-Synthetic High Mileage. … Valvoline MaxLife High Mileage Synthetic Blend. … Mobil1 High Mileage Engine Oil. … Amsoil Premium Protection Motor Oil.More items…•

When should I use 20w50 oil?

20W50 motor oil is suitable for warmer climates, where the higher temperature causes the oil to thin. It is also useful for vehicles subject to hot temperatures and for those used for high-stress activities such as hauling or pulling trailers.

Which is better 10w30 or 20w50?

But what’s really important is that you use the oil viscosity the owner’s manual recommends. … So, 10W30 oil has less viscosity (flows easier) when cold and hot than does 20W50. Once the engine is running, the oil heats up.

What is 10w40 oil good for?

Using the correct viscosity oil eases starting, reduces friction, and slows wear. For even more effective start-up protection, use a synthetic 10W-40 instead of a conventional 20W-50. The synthetic 10W-40 flows easily and still maintains enough viscosity to protect piston skirts and bearings when it gets hot.

Will 20w50 increase oil pressure?

With 10w30 the engine will produce a maximum of 55 psi of oil pressure at operating temperature. With 20w50 racing oil and the same operating conditions, it will produce 70 psi of oil pressure.

Will heavier oil hurt my engine?

Not only that, but the engine will waste energy pumping the thicker motor oil, reducing fuel economy. Since thicker oils don’t transfer heat as well as thinner oils, operating temperatures will increase, too, possibly leading to accelerated chemical break down and harmful sludge and deposits.

Can I use 20w50 oil instead of 10w40?

As per Z32 fsm,10W40-20W50 is recommended if the car is driven fast,raced,or in driven in hot climates,and 10W30 is recommended for fuel economy only.

Is 10w40 good for winter?

Yes, although they are both technically 10w oils, a 10w-40 is much thicker in cold conditions compared to a 10w-30.

What is the thickest motor oil you can buy?

The thickest viscosity grade for automotive applications is a SAE 60 which has a viscosity between 21.9 and 26 cst at 100c. Pretty thick stuff. Used in older engines, large Diesel engines.

Is 10w40 good for high mileage?

The slightly thicker oil film from the heavier base weight oil – 10W – can help protect worn engine bearings as well. As long as you’re not hearing knocking or serious mechanical noises from the engine, the heavier oil should buy you many more miles of service from your vehicle.

Is it OK to use 20w50 oil?

If an engine oil has a high viscosity, this means that it is thick; a low viscosity means that it is thin. Select an engine oil with an SAE (viscosity) classification suitable for the prevailing outside temperatures. … F, and 20W50 is OK to use at ambient temperatures above 23 deg.

Will thicker oil stop oil burning?

A lot of oil-burning takes place because an engine’s piston rings are worn out, and thicker oil won’t fix that. Using thicker oil is also a particularly bad solution for modern cars. … They use low-viscosity oils that splash easily all over the moving parts of the engine to make sure they’re all lubricated.

Is 20w50 good for high mileage?

You need worry no longer about engine wear. Gas mileage should theoretically go down, but probably not enough to even measure. … The 20W50 motor is worse for engine wear. The valve stem seals are probably leaking oil into the cylinders and being burned.