Is It OK To Mix 10w30 And 20w50?

Is it OK to mix different weights of motor oil?

It is always advisable to not mix motor oil brands, however, different viscosity grades of the same brand motor oil are compatible.

But there’s absolutely no danger about incompatibility resulting from mixing engine oils,” Miller says.

“We’ve tested all of our grades and brands, and we haven’t observed any problems.”.

When should you 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.

Can I use 10w40 in my Harley?

If you’re going to be riding in below 40° ambient temperatures HD does recommend 10W-40 but unless you are, it’s a poor choice for the engine. You can use 10W-40 in the primary, though. I use Mobil 1 Racing 4T 10W-40 synthetic in the primary and it works well.

Will thicker oil damage 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.

What oil is thicker 15w40 or 20w50?

20w50 is thicker at both low and high temps than 15w40. Kruzin – Other way around on the hot vs cold. A 15W-40 is designed to measure the same as a hot 40 weight when hot, and the same as a cold 15 weight when cold. Still thicker when cold, however.

What happens if you put 10w30 instead of 5w30?

Your oil is a little thicker when cold. No damage will happen. … The 5W and 10W defines how the oil will flow at 0 degrees. At operating temperature, there will be a completely insignificant difference between the two.

Is mixing 5w30 with 10w30 bad?

Mixing different oils will not improve the performance or efficiency of the engine in any way. The additives in synthetic oil may have limited or no effect at all when mixed with a regular engine oil. … 5w30 and 10w30 are both 30 weight oils and the exact same thickness in your engine when it is at operating temperature.

Can I use 20w50 instead of 10w30?

So if you are in a cooler climate its better to stick with 10w-30, if that’s not available then you can use 20w-40 it will not damage the engine but it is not better. If you are in moderate to hot climate it will be better in some cases if you choose 20w-40, it will provide better lubrication in higher temperature.

Can I mix 15w40 with 20w50?

Can I use 20w50 oil as a top up to my 15w40 engine oil? … It is best to use the same brand, type and weight of oil you put in at the last oil change. Unless you are at the fringes of temperature range for the 15w-40 oil, putting the 20w-50 in isn’t going to change the viscosity of the oil enough to damage anything.

Is 20w50 good for high mileage?

Considerations. The viscosity level of engine oil 20W50 is geared toward racing engines, as opposed to high-mileage engines, that run extremely hot and need heavy load operation. … Since its viscosity is so great, it can drag down the functioning of the crankshaft, resulting in less horsepower.

What oil is thicker than 20w50?

The smaller number, (the 20 part of 20w-50) describes how the oil behaves at 40 deg C and a 20w at 40 deg C is about 10 times thicker than your engine wants. A 10w-40 is better at around 6 times thicker and a 0w-40 is much better at about 4 times thicker.

What happens when you mix 2 different oil weights?

Mixing different oils will not improve the performance or efficiency of the engine in any way. The additives in synthetic oil may have limited or no effect at all when mixed with a regular engine oil. … You can use 1 litre of 5W30 mixed with 5W40 and it will not cause any sort of ill effects to the engine.

Is it bad to mix 10w40 with 20w50?

Re: 20w50 and 10w40 mix The filter holds a good amount of oil, so yes, you will be mixing two different grades of oil which can lead to it congealing and cacking up all your oil ways.

Should I use thicker oil in a high mileage engine?

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.

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.

Which oil is better 20w50 or 15w40?

A 15W40 is going to have a much better aditive package and will more then likely be less volitile! 15W40’s usualy are shear stable were most 20W50 shear badly some down to a 30Wt.! If you want a good 15W40 Delo 400 and Delvac 1300 are the easiest to find and have excellent formulas.