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

It’s common practice to combine two oils with vastly differing viscosities. As a result, many people are wondering whether or not this will have a substantial negative impact. This will be the subject of our investigation in this piece. Can you, then, combine 5w30 and 10w30? 5w30 and 10w30 can be mixed, although it is not advised.

It’s not a good idea to combine two separate oils with two distinct viscosities. However, a large number of drivers have been doing this, and they appear to be fine with it. Many drivers claim that the incident had no negative impact on their vehicles’ engines. Different additives can be found in engine oil. The viscosities of these oils are also diverse. Because of this, combining two oils will not result in a smoother blend.

Now that you know what occurs when 5w30 and 10w30 oil are mixed, you’re ready to experiment in your car. You should be aware of the consequences of combining these two oils. When it comes to keeping your car in top working order, nothing beats a good oil change. In order to maintain a healthy engine and achieve peak performance, you’ll want to use high-quality engine oil. Aside from keeping your engine from overheating, motor oil is a need. With that in mind, let’s get started with this topic.

Can I Mix 5w30 and 10w30 Oil?

So, 5w30 and 10w30 oil can be mixed without causing any harm, so you can do so. However, to clarify, the 10w30 has a higher density than the 5w30. Despite the fact that their densities differ, these two oils are quite similar. As a result, combining the two oils in your engine may be okay. As a result, you have the option of mixing the two oils. There have been reports of 10w30 oil being poured into a car and not even emptying out of the last 5w30. Fortunately, no damage was done to their engine or car as a result of the incident. However, the general rule of thumb is to use two sticks of the same oil and viscosity at a time.

This guideline is far superior to blending two oils of different viscosities, as it will provide you with far more advantages. The act of combining two types of motor oil, for example, will not injure or fail because you are combining oils with two different viscosities, but it is still not recommended.

Can You Add 5w30 to 10w30 Oil?

There is no problem with adding 5w30 to your 10w30, If, on the other hand, you’re changing the oil, it’s likely that the previous oil is already burning. As a result, no major harm will be done. The two oils are nearly identical in terms of working temperature.

Can You Add 10w30 to 5w30 Oil?

Yes, your 10w30 can be combined with your 5w30. Of course, avoiding it is always preferable. However, if you have no choice but to add it up, you can. There is no risk of serious injury or death.

Is It Ok To Mix 5w30 and 10w30 – Possible Downsides?

You can blend 5w30 and 10w30, that’s for sure. So you can blend these two oils together. You can, however, mix other oils if desired. This is the worst case scenario, yet it’s nearly unthinkable that the engine will die. Since many drivers have already been doing this for a lengthy period of time, there has been little to no damage to their automobiles.

What Happens if You Mix 5w30 and 10w30 Oil?

Mixing two different types of oil, according to some, can lower your car’s performance. This is because the additives, according to them, will not mix. These oils will likewise be different at low temperatures. When it’s cold outside, the 5w30 thins out and is easier to work with. However, your engine will be unaffected by any of this. It also doesn’t mean that mixing these two oils won’t cause any damage to your engine.

Having your warranty revoked because of that is the worst-case scenario That is why it is imperative that you check for any hint or caution about mixing 5w30 with a 10w30 in your owner’s manual. If the owner’s handbook states otherwise, you may lose your warranty coverage if you do this. As a result, you’ll be responsible for all of the repairs to your vehicle.


For this reason, it is not recommended to combine different types of oils. However, there are some oils that can be mixed. Mixing these two oils is never a good idea, but it is possible.

If you have no other option, you can combine the two. There would be no damage to the engine. Even yet, if you’d prefer to keep them separate, you can do so if the situation demands it.