Can you mix 5w20 and 30?

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 SAE 30 with 5W20?

Mixing 5W-20 and 5W-30 (or any other oils for that matter) may lead to faster wear and tear of your engine and eventually cause problems with the basic functioning of critical engine parts. And even if your engine allows it, you won't get any noticeable results by mixing different viscosity grade oils.
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What happens if I mix 5W-20 and 10W 30?

It should be fine, considering the temps, and that the suggested oil viscosity is usually 5W-30, so two quarts of 5W-20 and three of 10W-30 probably come pretty close to some viscosity around 5W-30.
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Can you put 5W30 in a 5w20 engine?

Is It Bad If I Put 5w30 Instead Of 5w20? It is possible for internal engine parts to be damaged if you mix 5W-30 oil with 5W-20 oil, as recommended by your vehicle's manufacturer. In addition, your engine may suffer from decreased fuel economy and horsepower as a result of wear and tear.
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Can I use 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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5w20 or 5w30? Which do I run and why. Is 5w20 a hoax for fuel milage?



Can you mix 20 and 30 weight oil?

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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What's the difference between 5w 20 and 5w 30?

Key difference between 5w20 and 5w30

5w20 is an engine oil type characterized by its winter rating of 5 and an oil weight of 20 in warmer conditions. It is less viscous compared to 5w30. 5w30 has the same viscosity rating of 5 during winter but an oil weight of 30 during hotter conditions hence it is thicker.
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What happens if I mix two different oils in my car?

It is not recommended to routinely mix oils because the additives in different products may interact or the oils may become destabilized by the mixture. You may reduce or negate the properties of the additives. You could lose the benefits of the more expensive synthetic oil.
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Will mixing oils hurt your car?

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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Can you top up 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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Is it OK to mix brands of motor oil?

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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Is 5w20 thicker than 5w30?

So, due to viscosity, 5w20 is a thinner oil during operating temperatures, whereas 5w30 is thicker during operating temperatures. A majority of manufacturers are now producing engines that operate on 5w20 oil, to which it's important to stick to this viscosity and not substitute 5w30.
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What happens if you put the wrong oil weight in your car?

Using the wrong fluid can cause poor lubrication, overheating, and possibly transmission failure. A mechanic might not be able to reverse the damage, even by flushing the transmission. Mistakenly adding motor oil or brake fluid can also destroy your transmission.
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Is 5w30 good for high mileage?

Amazon Basics Full Synthetic is the best 5w30 oil for high mileage vehicles. This oil should only be used on vehicles exceeding 75,000 miles. This motor oil is formulated for longer drain intervals. It helps in preventing a build-up on drain intervals and preventing rust and corrosion.
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Is it OK to mix different viscosity oils?

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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What is 30 weight oil used for?

SAE 30 oil is typically used for smaller air-cooled engines, like the ones in small tractors, lawnmowers, and chain saws. Most motor oils today are multi-grade oils that will perform well in all seasons.
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Can I use SAE 30 in my car?

This means you can mix any SAE graded motor oils. You might see SAE 30 oil specified for an older engine, like those in classic cars. However, modern engines typically require multi-grade oils, so using an SAE 30 motor oil in any vehicle built recently would be inadvisable. Always check the owner's manual first!
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What weight oil is best for high mileage?

  • Top 5 Engine Oils for High Mileage Cars and Trucks. #1 – Mobile 1 High Mileage Synthetic Oil. #2 – Royal Purple HMX Synthetic Oil. #3 – Mobile Super High Mileage Synthetic Oil. #4 – Castrol GTX High Mileage Synthetic Blend Oil. #5 – Pennzoil High Mileage Synthetic Blend Motor Oil.
  • How Many Miles is Considered High Mileage?
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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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When should I use 5W-30 oil?

5W-30 oil is primarily a winter viscosity grade motor oil. While it does perform adequately at a higher temperature, its best use is for people who drive in cold temperature regions. Due to its lower viscosity, it's typically recommended for petrol vehicles or a light-duty diesel engine.
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Is 5W-30 oil synthetic?

Mobil 1™ 5W-30 is an advanced full synthetic motor oil designed to keep your engine running like new by providing exceptional wear protection, cleaning power and overall performance. Mobil 1 5W-30 meets or exceeds the requirements of the industry's toughest standards and outperforms our conventional oils.
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Can you mix oils of the same weight?

You can indeed use the same oil weight already in the vehicle, but mixing weights just isn't recommended.
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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 put 5w 40 oil in a 5W30 engine?

Can You Add 5w40 To 5w30? Miscible oils are those that are not formed by heat. It is not necessary to add one to the other in any significant proportion since they will easily form a solution together. If you mix 1 litre of 5W30 with 5W40, there will be no harm to the engine, as long as it is mixed with 5W40.
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What happens if you put new oil on top of old oil?

What happens if you put new oil on top of old oil? When you mix new and old oil, the new oil becomes “watered down” with the lack of interfacial tension and strains to do its' job. Be sure to have your oil changed as soon as possible.
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