Question: Should You Put Thicker Oil In An Older Engine?

What oil is best for old 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…•.

Is it OK to use 0w20 instead of 5w30?

0w-20 is simply a different viscosity of oil. It won’t be an advantage to your engine if your manufacturer suggests you use 5w-30 and may indeed be a detriment to your engine. 0w-20 may be a recommended oil for certain conditions for your engine and may not be recommended for your engine.

Will 5w20 hurt a 0w20 engine?

Sure, 0W20 will flow better than 5W20 at low temperatures, but the difference is minimal and both versions run thin in cold conditions. However, if you live in an extremely cold region, the 0W oil will do less damage than the 5W oil while starting the engine.

Can the wrong oil damage your engine?

If the hot viscosity of the motor oil is not high enough, the oil may start to break down under extreme (hot) conditions and it won’t lubricate the components of the engine properly. … Over time, this can lead to long-term damage in your engine due to excess friction between metal components.

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.

Which oil is better 0w20 or 5w30?

It readily means that the 0 oil will flow well and better at a cold temperature more than 5W-30 oils even while maintaining the same viscosity. The 0W-20 is said to be the best oil in the market because it helps to reduce environment hassle on waste oil disposal.

Which oil is thicker 5w30 or 10w40?

A 10w-40 motor oil is a thicker oil at startup than a 5w-30 motor oil. Therefore, 10w-40 oil clings to the engine’s moving parts more than the lower viscosity 5w-30 oil.

Is it okay to mix 5w30 with 10w40?

As posted above, mixing 5w30 with 10w40 will give you an oil that performs somewhat better in the cold than 10w40, but less good cold than 5w30, and that has a viscosity a bit higher than 5w30 but a bit lower than 10w40. … Mixing different oils will not improve the performance or efficiency of the engine in any way.

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.

Do high mileage cars need thicker oil?

High-mileage motor oil doesn’t hurt and it could prevent leaks from starting. … Some mechanics recommend switching to a thicker (higher viscosity) oil — such as 10W-30 full synthetic oil instead of 5W-20 full synthetic — or using oil additives to stop leaks.

What happens if I put 10w40 instead of 5w30?

If you use 10-w-40 instead of 5-w-30 specified by the manufacturer then the viscosity of 10-w-40 used by you will be higher and oil thicker than what is specified during winters. Similarly the oil viscosity will be higher and oil thicker than specified during summers.

Which oil is thicker SAE 30 or 40?

SAE 30 is typically called for in lawn mower or similar engines. 40 weight oil is going to be just a little thicker (technically speaking more viscous). … SAE 30/40/50 mono grade oils are of the past and no longer being used now with the advent of multigrade oils and of late synthetic oils.

What if I use 5w20 instead of 5w30?

Even though there is not much difference in the levels of protection you get from 5w20 and 5w30 motor oils, there is a slight difference in their viscosity. … However, if you live in a colder climate, you would want thinner oil that will heat up quickly, which means 5w20 will definitely a better option for you.

Is high mileage oil thicker or thinner?

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.

When should I use thicker engine oil?

Within reason, thicker oil maintains a better lubricant film between moving parts. Some have even used thicker oil in a leaky engine to prevent oil from seeping out. But really, thicker oil is not good for your engine. Not when “thicker” means higher viscosity than the manufacturer recommends.

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.

What is the best oil for high mileage cars?

The Best High Mileage OilValvoline High Mileage Motor Oil. … Castrol GTX High Mileage Synthetic Motor Oil. … Mobil 1 High Mileage 5W-30 Motor Oil. … Pennzoil High Mileage Oil. … Castrol High Mileage Advanced Full Synthetic Motor Oil. … Royal Purple High-Mileage Synthetic Motor Oil. … AmazonBasics High Mileage Motor Oil. … Mobil 1 High Mileage 5W-20 Motor Oil.

What happens if I use the wrong oil in my car?

You might notice a few oil spot in your garage or under your car because using the wrong oil can lead to leaks, or you might become aware of a burning smell while driving. If the oil isn’t working as it should engine parts might not be lubricated well enough and cause friction, which can burn the oil.