Updated at: 13-03-2022 - By: micdot

When it comes to your car, you can’t go without engine oil. People are inquiring if they can use 5w20 and 5w30 oils in the same engine. If you’re curious about the answer, stick around. Can 5w20 and 5w30 oils be mixed? It is possible to blend 5w20 and 5w30 oils, although it is not recommended. Despite the fact that this fusion has no major drawbacks, it is not suggested for any vehicle. When it comes to this subject, people are split. Some people believe that mixing two different viscosity levels of motor oil is acceptable. There are many, however, who believe that combining these lubricants might seriously harm your car’s engine.

The idea that combining a 5w20 oil with a 5-W-30 is a recipe for disaster is exaggerated. Even though it’s not a good idea to combine these two oils, it’s unlikely to result in catastrophic engine failure if you do. However, a 5w30 and a 5w30 can both provide you and your vehicle with the same level of quality service. Both of these oils are capable of flowing quite uniformly even at low temperatures. The fact that both oils are from the same manufacturer and API class means that they will blend seamlessly. However, there are times when the availability of such a product necessitates the usage of a different viscosity level. As a result, it’s critical to understand what you can and cannot do when combining or adding two oils of differing viscosities. To learn more about the 5w20/5w30 oil blend, continue reading. Let’s get started right now.

Can I Mix 5w20 and 5w30 Oil?

Yes, that’s the simplest response. Yes, 5w20 and 5w30 oil can be mixed. Do not worry about the safety of your vehicle or engine, since it is completely secure. If you use 5w20 or 5w30 engine oil to top it off, there is no substantial risk to the engine’s internal workings. As a result, engine oils contain a variety of additives. Their weight rating is different because of the variations in their additives.

The additives will not mix and become one if you mix these oils. However, your engine will not be seriously harmed as a result of this. Some folks will wonder why you’d mix the two together in the first place. It’s possible that some people’s original oil has run out, in which case a different viscosity level will be required. To fix the problem, you need first drain the old oil out of your vehicle and then replace it with a new one. Regardless of how much oil is drained or not drained, your engine will not malfunction. As a result, you have the option of doing either of these things. Even a little homework can help you keep your car safe. Use your owner’s manual to determine whether the activity is safe for your car. A similar winter rating can be found in the 5w20 and 5w30 tyres. To declare that two products have the same winter rating means that they will have the same viscosity when exposed to cold temperatures.

However, if you compare a 5w30 to a 5w20, you’ll notice that the 5w30 has a slightly higher viscosity at 100 degrees Celsius. This means that for typical temperatures, the 5w-30 oil will be thicker than the 5w-20.

Can You Add 5w20 to 5w30 Oil?

It is possible to increase the viscosity of your oil from 5w20 to 5w30 without causing any major problems. If you don’t detect a difference in your engine, this isn’t a problem. If both oils come from the same producer and API classification, this is the safest option. Changing your entire oil instead of simply topping it up is an option if you can’t find 5w30 oil.

Can You Add 5w30 to 5w20 Oil?

Yes, you can mix 5w30 with 5w20 if you like. In any case, there will be no major changes to note here. Even if some people advise against it, contemporary oil has a wide range of viscosity properties that can be blended. If you have no other choice, you can combine these two.

Is It Ok To Mix 5w20 and 5w30 – Possible Downsides?

Yes, that’s OK. You can blend a 5w20 oil with a 5w30 oil and have no problems whatsoever. In addition, you must make sure that the API classifications and the manufacturing classifications are identical. However, if you can avoid combining the two, you should probably do so. Due to the fact that it’s a general rule of thumb that you should never mix two different viscosities, this is why. Follow this rule if you want to be on the safe side. But if you’re up for a challenge, mixing it up is a possibility.

What Happens if You Mix 5w20 and 5w30 Oil?

A 5w20 and a 5w30 oil mix should cause no harm. The two oils will naturally combine. That’s not likely to happen, though; the oils might remain on their sides and flow independently. Prior to blending your oils, you should make sure they all come from the same company. As a result, it can retain a high level of performance because the variances aren’t going to be enormous.


Overall, the answer is “yes” when it comes to combining 5w20 and 5w30 motor oils. Make sure they’re all from the same company. Even if they don’t share the same name, it’s fine. Oil changes are necessary since motor oils do not last very long. Change the entire oil if you add a different viscosity level to your original oil.