No, you should not mix 5W20 and 0W20 oil. These two types of oils have different viscosities and weights, which means they will have different properties when mixed together. The 0W-20 oil is thinner than the 5W-20 oil and can cause it to thin out too much for optimal engine performance.
Therefore, if you mix them together you will likely experience reduced fuel economy as well as increased wear on the engine components due to inadequate lubrication. Additionally, mixing these two oils may create a sludge that clogs up your filters and reduces the life of your engine parts. It is best to stick with one type of oil in order to ensure optimal performance from your vehicle’s engine.
- Step 1: Gather the necessary supplies, which include a measuring cup, gloves, eye protection and both motor oil containers
- Step 2: Pour the 5W20 motor oil into the measuring cup
- Make sure to not exceed the capacity of the container
- Step 3: Add 0W20 motor oil to the same measuring cup until you reach your desired mixture ratio
- For example, if you want a 50/50 mix of 5W20 and 0W20 oils then pour equal amounts of each in the measuring cup
- Step 4: Carefully combine both types of motor oil in one container with a stir stick or spoon for uniformity and evenness of blend
- Step 5: Double check that you have enough combined volume for your engine’s needs before pouring it into your car’s engine system

Credit: www.syntheticoil.me
Can You Mix 5W20 Full Synthetic?
Yes, you can mix 5W20 full synthetic oil with other types of motor oils. Synthetic oil offers superior performance and protection to a vehicle’s engine compared to conventional motor oils, making it an ideal choice for modern engines that need increased protection due to higher temperatures, tighter tolerances and greater wear and tear. Full synthetic 5W20 is especially beneficial in cold climates as the lower viscosity ensures the engine will start easily even at low temperatures while still providing superior protection compared to conventional oils.
If your vehicle calls for 5W20 full synthetic but you’re using another type of motor oil such as 10W30 or 15W40, it’s generally recommended that you don’t mix them together as this could cause problems with the lubrication of your engine components over time. However if you have no other option than mixing two different types of motor oil together then most experts agree that adding a small amount (no more than 1 quart) of fully synthetic 5w-20 won’t cause any major issues over short term use.
What Oil Can You Mix With 5W20?
When it comes to oil, it is important to make sure you have the correct type for your vehicle. With that being said, if you are using 5W20 oil in your car or truck, there are several different oils that can be safely used with this grade of oil. Here we will look at the types of oils that can be mixed with 5W20 and how they work together.
The first option would be a synthetic blend motor oil like Mobil 1TM 0W-30 or Castrol Edge 0W-30 which contains a combination of synthetic base stocks and conventional base stocks. These blends provide good protection against wear while also having improved cold weather performance characteristics compared to standard mineral based motor oils. When mixing these lubricants with 5w20, they will help reduce the operating temperature of the engine as well as increase fuel efficiency by reducing friction between moving parts.
Another option would be full synthetic motor oils such as Pennzoil Platinum® Full Synthetic Motor Oil 5w30 and Valvoline MaxLife™ High Mileage Synthetic Blend Motor Oil 0w40 which contain 100% pure synthetic base stocks designed for maximum protection and high performance operation under extreme conditions such as racing applications or off road driving where temperatures may exceed normal parameters. When combining these two grades of oil together, you get an incredibly durable lubricant that provides superior protection against wear while also improving fuel efficiency due to its reduced viscosity rating when compared to traditional mineral based motor oils.
Finally, another great option for mixing with 5w20 is a semi-synthetic blend like Shell Rotella T6 Multi-Vehicle Full Synthetic Heavy Duty Diesel Engine Oil 15w40 which combines both natural and synthetic components into one product giving you increased levels of thermal stability over straight mineral based products without sacrificing any other benefits such as oxidation resistance or anti-wear properties normally seen from fully synthetics alone.
What is the Difference between 0W-20 And 5W-20 Full Synthetic Oil?
0W-20 and 5W-20 full synthetic oils are two types of motor oil that can be used in different types of cars. The numbers refer to their viscosity, or how well they flow. 0W-20 is the thinner of the two oils, meaning it has a lower viscosity and flows more easily at lower temperatures than 5W-20.
This makes 0W-20 better suited for cold climates as it reduces wear on engine parts during start up when temperatures are low. It also helps engines warm up faster in colder weather. On the other hand, due to its higher viscosity level, 5W-20 offers more protection against wear on engine parts at high operating temperatures compared to 0w-20 – making it suitable for hotter climates where you may drive with your engine running longer periods of time without stopping or cooling down.
Additionally, because 5w– 20 is thicker than 0w– 20 , it will help keep components such as valves and pistons clean by preventing dirt build up over time which can lead to long term performance issues if left unchecked. Ultimately choosing between these two options depends largely on weather conditions in your area; if you live in a colder climate opt for 0w– 20 while those living in warmer areas should go with 5w– 20 .
What Happens If You Put 5W-30 in a 0W20 Car?
Putting 5W-30 oil in a vehicle that requires 0W20 can cause several negative consequences. First, the viscosity of 5W-30 is too high for an engine that calls for 0W20 and will result in reduced fuel economy due to increased friction and resistance. Additionally, the thicker lubricant may not effectively reach certain parts of the engine like it would with lower viscosity oil, which could lead to corrosion and excessive wear on internal components.
Furthermore, putting 5W-30 into a car designed for 0W20 will likely void your warranty as many vehicles must use specific types of oil specified by the manufacturer. Finally, using incorrect grade or type of oil could damage sensors that measure oil pressure or temperature due to its ability to more easily flow through small passages than higher viscosity oils. To avoid any potential issues it is important to check your owner’s manual before changing your vehicle’s motor oil so you know exactly what type you need based on make, model and year specifications.
0W20 Vs 5W20 – Which Is The Best For You?
Can I Mix 5W-30 And 0W-20
No, it is not recommended to mix 5W-30 and 0W-20 motor oil. Different viscosity oils have different properties that are designed for specific engines, so mixing the two can result in damage to the engine or reduced performance. If you need a different viscosity of oil than what’s currently in your engine, it’s best to completely drain out the old oil and replace it with the new type.
Conclusion
In conclusion, the general consensus is that it is not advised to mix 5W20 and 0W20 motor oil. While it may seem like a cost effective solution in certain situations, the potential for engine damage resulting from such a combination of oils far outweighs any advantages. If you are uncertain as to which type of oil you should be using in your vehicle, consult your owner’s manual or speak with an experienced mechanic.