Can you mix 20 and 30 weight oil?

mixing different weights is fine as is mixing different conventional and "blends"/synthetics. i.e. 2 quarts of 5w-20 and 2 quarts of 10w-30 gives you a 7.5w-25.
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Can you mix 20w with 30w oil?

Nope, no trouble at all.
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Can I mix different weights of 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 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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What happens if you mix 5W20 and 5W30 oil?

Yes, you can top up your 5W20 with 5W30 or the other way around. Keep in mind that it's probably not a good idea to mix the two oils, because 5W30 is thicker than 5W20 but the mixture won't harm the engine anyway. It's generally accepted that mixing different weights is better than using one weight for your engine.
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Will Mixing 10 Motor Oils Damage an Engine? Let's find out!



Is 5W-20 or 5W-30 better for high mileage?

As you have likely now concluded, 5W20 is better suited for colder temperatures. If you need motor oil for summertime performance, 5W30 is going to be the better bet. However, you should only switch to this oil type of your car manufacturer or personal mechanic recommend doing so.
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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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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 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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What happens if you mix oil viscosity?

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 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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What happens when you mix different types of oil?

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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Is it OK to mix 10W30 and 20W50?

Can I mix 10W30 with 20W50? No, you'll be fine. I swear I didn't know. If you mix viscosity grades such as a 10W30 low-viscosity oil and a 20W50 higher-viscosity oil, it is reasonable to expect that the resulting product will have viscosity characteristics which are thicker than the 10W30, but thinner than the 20W50.
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Can I mix synthetic oil weights?

Can You Mix Different Synthetic Oil Weights? Synthetic isn't quite like dino-oil (where the base stock is essentially the same and viscosity deltas are mostly a function of additives), but it can be mixed just fine. Synthetics are formulated with viscosity, so mixing is not a problem.
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Can I mix SAE 40 with 20W50?

If you put SAE 40 into an engine designed for 20W then it will struggle to start. The starter motor will be overstressed.
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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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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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What happens if I put 10w30 instead of 5w20?

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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Can you put 5W 30 instead of 5w20?

In general, it is not recommended that you use 5w30 oil (or any other oil weight) in place of 5w20 oil, as the slightest difference in viscosity can potentially damage your engine.
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Can I put 5w30 instead of 0w20?

There are now multigrade motor oils available for all types of motor oil. However, 0w20 and 5w30 are among the best in their class. The performance of your vehicle will not be affected if you add 5w30 instead of 0w20. You will continue to enjoy comfortable rides in your vehicle as long as it runs smoothly.
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Can I use 5w20 instead of 5w30 in winter?

If you are using 5w20 instead of 5w30, you should be careful. The 5W20 is thinner and colder than the 5W10. The use of 5w20 in warmer temperatures may result in more friction and faster engine wear, as opposed to 5w30 in cooler temperatures. It will eventually affect your engine's performance and life expectancy.
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Is 5w20 thinner 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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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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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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Which oil is thicker 20W50 or 10W30?

It really comes down to personal preference. As your engine does put out significant horsepower, we would lean toward using 20W-50. If your engine sees very light duty or is built exceptionally tight, 10W-30 would be fine. But again, if you twisted our arm, we would give 20W-50 the nod for the thicker viscosity.
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