Is it OK to mix motor oils?

Yes. If it's something you do only occasionally, mixing shouldn't damage your engine. Let's say you want to top off your oil, just to keep you rolling until your next regularly scheduled maintenance check. Mixing is alright, if the oil you use is the weight (or viscosity) recommended in your owner's manual.
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Is it OK to mix brands of motor oil?

THE ANSWER IS NO!

Even if two different brands of oil have the same viscosity, you still should not be mixing them together.
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What happens if you mix different car oils?

Mixing different types can destabilize your motor oil, reducing its efficiency and affecting your engine's performance. The smartest choice is to stick with the oil type and oil change intervals recommended by your car's manufacturer and visit your local car care experts for affordable services.
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What happens if you mix 2 engine oils?

It is important to note that mixing different types of oil will not harm your engine in any way in the short term. The majority of synthetic and semi-synthetic engine oils are based on regular oil and can be used in engines. The engine will not be improved by mixing different oils.
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Is it OK to mix engine oil viscosities?

yes you can mix same brand and type oils with different viscosity and it will be fine as long as you don't mix them 50/50. If you mix 200 ml of oil with the rest of oil needed for your engine you will be totally fine.
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Will Mixing 10 Motor Oils Damage an Engine? Let's find out!



Can I mix 10W30 and 10W40?

Mixing 10W30 with 10W40

Some say that mixing them is fine as long as you don't live in freezing weather. Even if you put together synthetic and conventional blends of these motor oils, they show no harm to your vehicle. However, this is true only if you mix in a quart of the other type to your usual engine oil.
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Can I mix 10W30 and 5W30?

Adding 10W30 to your current mix is safe, and will not cause your engine to run any worse. But keep in mind that 10W30 has more density than 5W30. 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 you mix 5W 20 and 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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Can I mix 5W30 and 5w40?

you can mix 5w30 with 5w40, you won't notice much of a difference in regular temperatures, but if you have a high-end, luxury car or performance car, it might be a good idea to use the only 5w40, even in emergencies, as it might cause inconsistencies especially under load which can lead to unwanted damage.
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Can you mix 5W 40 with 15W 40?

everything ive ever read has always said never mix different weights of oil. the life of the synthetic amsoil will not be as long when you mix it with the regular oil. Wrong. Mixing a dino with a syn, a syn with a dino, a 5W-40 with a 15W-40, and so on is fine.
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What happens if I put 10w30 instead of 5W30?

Can I Mix 10w30 and 5w30? Most oils will mix perfectly, provided they have a similar synthetic. Therefore, there is no problem in mixing 10w30 and 5w30 since one will be topping up. Mixing the viscosity of oils will not have any effect on the engine.
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What if I put 5W30 instead of 5W20?

While both 5W20 and 5W30 motor oils are suitable for high mileage engines, the best viscosity type for your vehicle depends on how the manufacturer designed the engine. Using 5W30 when it is advised that you use 5W20 can result in your vehicle not getting good fuel economy.
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Can I use 10w40 instead of 5W30?

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.
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Can I mix Pennzoil and Valvoline?

Can You Mix Two Synthetic Oil? Yes. It is not possible to mix synthetic and conventional motor oil. Synthetic oil, however, will lose some of its advantages when conventional oil is used.
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Can you mix Mobil 1 with Pennzoil?

Yes, you can safely mix one brand of oil (e.g. Mobil 1) with a different brand (e.g. AMSOIL) or conventional oil with synthetic oil (in fact, that's what a synthetic blend is). Most synthetics today are fully compatible with conventional oils and can safely be mixed.
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Can I top up oil with different oil?

You can add any engine oil as long as it has the right specifications — preferably with an official approval of the OEM (Original Equipment Manufacturer). Not the brand, but the specification and viscosity indicated in your car's manual are your reference for using the right oil.
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Can I mix 5w30 and 10w40?

Is It Ok To Mix 10w40 With 5w30? The brand should be the same as the product. It is not compatible with the additives to mix brands.
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Can you mix 5w40 and 10w40?

Registered. As long as both oils have the same C-classification, or at least close -no problem in mixing different weights.
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What happens if you mix 5w20 and 10w30?

Can You Mix 10w30 And 5w20? Usually, when you mix 2 oils of different viscosity or weights, it might not cause any problem for the engine as both oils will lubricate the engine as they were meant to. However, it's a myth that mixing oils improves the engine performance of a vehicle.
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Can you mix 5w40 and 5w20?

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 5w20 and ow20?

It's possible to mix both 0W20 and 5W20 engine oils. However, it isn't advisable to mix them. Both 0W20 and 5W20 have almost the same properties when utilized in fair-weather temperatures, so they are technically compatible. However, there's a higher chance that their blending will fail at the -35°C test.
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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 5w30 and 30w oil?

No, it may be a terrible idea to mix SAE 30 with 5w30 because they are not of the same grade. The SAE 30 is a single-grade oil, while the 5W30 is a double-grade oil. Mixing them might have you counting losses, and your engine will pay for it. 3.
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What happens if you put 10W40 instead of 10W30?

If you were to put 10W40 in an engine designed for 10W30, the “thicker” oil would lead to friction in the engine and an increased load on the oil pump. The car would have to do more work to get the oil around the engine block.
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Is 10W-40 too thick?

A low viscosity oil will move quicker through the engine to keep it lubricated and cool. Additionally, if your engine has a lower running temperature, 10W-40 motor oil might be too thick. Its higher viscosity at running temperature can reduce engine effectiveness as it'll need more energy to keep the engine operating.
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