What happens if you mix 5w20 and 10w30?

Generally, when you mix two oils of different weight or viscosity, the mix won't actually cause any damage to your engine because both oils will keep lubricating the engine components. Your car manufacturer's recommendation notwithstanding, mixing 5W20 and 10W30 won't cause any harm to your engine.
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Can I mix 5w20 and 10w30 oil?

You will be fine, just don't overfill. In the middle of the marks is just great too. Best to change as soon as you can.
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What happens if you mix different weight oil?

Can oils of different grades be mixed? The good news is that mixing different types of oil it will not harm your engine in any way in the short run. Most synthetic and semi-synthetic engine oils are based on regular oil and are compatible.
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Can I mix 5W and 10W-30?

These two motor oils are very similar in viscosity; hence, they might mix perfectly in your engine. Therefore, you can mix 5W30 with 10W30 with no ill effects whatsoever.
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Can I switch from 5w20 to 10w30?

Originally Answered: Can I put 10w30 instead of 5w20? You can, but you will get worse mileage, and in most cases shorten the life of your engine, as it will take longer to pump up pressure for your bearings and lifters, and won't spray your lower cylinders for an extra second or so on each cold start.
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Will Mixing 10 Motor Oils Damage an Engine? Let's find out!



Does 10w30 hurt 5w20 engine?

Notwithstanding the recommendations of the car manufacturer, mixing 10w30 and 5w20 will not cause any sort of harm to the engine. However, a few drivers claim that it is safer to combine two multi-grade or straight weight oils, rather than mixing multi-grade with straight weight oils.
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What is the difference between 5 20 and 10W-30 oil?

Main Differences Between 5w20 and 10w30

5w20 is thinner at lower temperatures, whereas 10w30 is thicker at lower temperatures. 5w20 is better for cold-weather starting, whereas 10w30 is better for sealing action. Light duty petrol and diesel engines use 5w20, whereas large weight carrying engines need 10w30.
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Can you mix two different types of motor oil?

WHAT ABOUT MIXING ENGINE OIL BRANDS? Yes. It won't harm your engine to mix, for example, Quaker State® motor oil with Pennzoil, as long as the oil you use is the weight (or viscosity) recommended in your vehicle owner's manual.
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Is it OK to mix motor oils?

Since motor oils are generally made from the same ingredients (base oil and additives), they are typically compatible when mixed. (The American Petroleum Industry actually requires that all motor oil made in the U.S. be compatible with one another.)
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Is 10w30 better for high mileage?

10W-30 motor oil makes for a decent high-mileage oil. It gives a better fuel economy while reducing the oil consumption for older engines. Older engines with more than 75,000 miles on them require a thicker oil that will properly lubricate their critical engine parts and prevent oil leaks, sludge, and deposits.
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Can you mix 5w 30 and 10w 30?

It is still not a good idea to mix two different brands of oil, even if they have the same viscosity. The oil you use should be the grade recommended by your car manufacturer. However, if you mix two different brands of motor oil, you could damage your vehicle.
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Can you mix two oil weights?

The truth is simple: don't mix two different oils that have different weights (viscosities). Viscosity Grades might sound pretty scientific, but the simple fact is that this is what keeps your engine running smoothly.
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What happens when you mix oil viscosities?

What Happens If You Mix Engine Oil Viscosity? A higher viscosity motor oil will also reduce the efficiency of your car's fuel economy. As a result, thicker motor oil is more resistant to metal components, such as pistons, which are vital to the operation of the engine.
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Can you mix 5w 20 and 10W 40 oil?

“Yes. The best choice is always to avoid mixing motor oil brands, but different viscosity grades of the same brand can be used.
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Is it OK to top off oil with different weight?

There will be no problem with that. There will be no harm done as they mix right in. You will be fine even if you mix syn with conventional. If you were to labratory test your oil, it would read out as not a true 10W-30, but there will be no harm.
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What happens if you mix 5W20 with 5w30?

Yes, you can mix 5W20 and 5W30 oil. However, your engine MUST support it. Both oils should be of the same brand to prevent engine damage and should also be of a similar API service level.
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Will thinner oils damage your engine?

Just like using an oil with too high a viscosity may lead to problems in Brad's engine, using a thinner oil can have the same result. Oil that's too thin can fail to develop a consistent lubricating film, inviting metal-to-metal contact that causes wear. Extreme stress and heat add to the challenge.
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What happens if you mix different brands of motor oil?

While mixing car oils isn't bad from your engine, there are a few things you need to be careful about. Mixing different industrial oil formulations for hydraulic systems, compressors and gearboxes can be bad for the seals and bearings. This doesn't apply to certified oils.
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Why can't you go back to regular oil after synthetic?

Myth: Once you switch to synthetic oil, you can never switch back. This is one of the most persistent myths about synthetic oil—and completely untrue. You can switch back and forth at any time. In fact, synthetic blends are simply a mixture of synthetic and conventional oils.
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Is 5w20 good for winter?

5W20 motor oil is another low-temperature grade typically recommended for winter use, with a 10W-30 as an alternative for higher temperatures. This oil type is common because it provides the best fuel economy, saves fuel consumption, and has fewer exhaust emissions.
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What happens if I put 10W40 instead of 5w20?

Lose a little gas. mileage and lubrication is not as good plus it puts more strain on the oil pump. Never go thicker than a 5w30 and that would be more for an older higher mileage engine in warmer climates. So go change it back to 5w20.
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Is 10w30 good for winter?

10W30 vs 10W40 Oil FAQs

10W-30 motor oil is recommended for ambient temperatures not exceeding -30°C/-22°F in the winter or 35°C/95°F in the summer. This is a great motor oil to use if you live in Canada or cooler U.S. states. Colder regions would require 5W-20, while hotter regions may call for 10W-40.
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What oil is heavier than 5w20?

The motor oil is categorized according to its viscosity. Whether the oil is thicker or extra thinner, it specifies the type of engine it is suitable for. There are hundreds of oils but 10w30 and 5w20 are the most common of all. The 10w30 type is the thicker one and 5w20 is the thinner.
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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.
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What is 5W 20 oil good for?

What Is 5W-20 Oil Good For? As 5W-20 is a low viscosity oil, it's best suited for cars that drive a lot in low temperatures and colder climates. It's ideally recommended for light-duty petrol and gasoline engines, and can help with engine deposits and wear and tear problems.
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