Is it OK to mix different weight oils?

The truth is simple: don't mix two different oils that have different weights (viscosities). Viscosity Grades might sound pretty scientific, but the simple fact is that this is what keeps your engine running smoothly.

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.

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.

Can you mix two 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.

What happens if you mix different viscosity oils?

There will be no problem with that. There will be no harm done as they mix right in. You will be fine even if you mix syn with conventional. If you were to labratory test your oil, it would read out as not a true 10W-30, but there will be no harm.

Will Mixing 10 Motor Oils Damage an Engine? Let's find out!

Can you mix 10w 30 and 15W 40?

you can mix the two without a problem, for Wisconsin, the 15w 40 would be a better oil in the summer and 10w 30 would be a better oil for the winter, if you drive the car in the winter! I have Rotella 15w40 weight oil in my LT-1 now and I just found a place that sells 10w30 which would be a better choice.

Can you mix 10w 30 and 10w 40?

Mixing 10W30 with 10W40

Some say that mixing them is fine as long as you don't live in freezing weather. Even if you put together synthetic and conventional blends of these motor oils, they show no harm to your vehicle. However, this is true only if you mix in a quart of the other type to your usual engine oil.

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.

Can you mix 5W 40 with 15W 40?

everything ive ever read has always said never mix different weights of oil. the life of the synthetic amsoil will not be as long when you mix it with the regular oil. Wrong. Mixing a dino with a syn, a syn with a dino, a 5W-40 with a 15W-40, and so on is fine.

Can I mix 5w30 and 5w40?

you can mix 5w30 with 5w40, you won't notice much of a difference in regular temperatures, but if you have a high-end, luxury car or performance car, it might be a good idea to use the only 5w40, even in emergencies, as it might cause inconsistencies especially under load which can lead to unwanted damage.

Can you mix 5W-20 and 10w 30?

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.

What happens if you put in 5W-20 oil instead of 5W-30?

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.

Can you switch from 5w20 to 5w30?

There is no need to do this. Although both 5w30 and 5w20 have the same winter rating of 5, the thickness (viscosity) of 5w30 is a bit higher.

What happens if you mix 10w40 with 15w40?

There is absolutely no harm in mixing different grades of engine oil! All motor oils are required to comply with international standards which include a compatibility test. This means that any branded engine oil will mix with the standard test oil in any proportions and the mixture will still perform as specified.

What happens when you mix different types of oils?

Let's Get You an Oil Change

Also, consider that even though motor oils contain the same essential ingredients, they each have different additives, chemical properties, and detergents. Mixing different types can destabilize your motor oil, reducing its efficiency and affecting your engine's performance.

Can I use 5W40 instead of 15w40?

5w-40 has a broader operating range than 15w-40. Unless you're penny pinching or you're misinformed about synthetic oils, it's stupid to pick the 15w-40 option. There is a single benefit to 15w-40 oils though, they will maintain their 40 weight operating viscosity longer than an oil that starts at 5w.

Can you mix Delo and Rotella?

Yes, it's fine. I've mixed many times say a gallon of Shell Rotella 15W-40 Synth Blend with like 9 gallons of Chevron Delo 15W-40 Synth Blend and vice versa, in a semi truck engine. For as long as you are using the equivalent type and good quality oil.

Can you mix 5w30 and 30w oil?

No, it may be a terrible idea to mix SAE 30 with 5w30 because they are not of the same grade. The SAE 30 is a single-grade oil, while the 5W30 is a double-grade oil. Mixing them might have you counting losses, and your engine will pay for it. 3.

What happens if I put 5w30 instead of 10W30?

Both 5w30 and 10w30 engine oils have a similar SAE rating, meaning that they will perform the same at high or operating temperatures. The digits 30 indicates the viscosity of the oils when in high temperatures. 10w30, however, will thicken more when in a cold climate. 5w30 is much suitable during the cold season.

What happens if you put 10W40 instead of 10W30?

If you were to put 10W40 in an engine designed for 10W30, the “thicker” oil would lead to friction in the engine and an increased load on the oil pump. The car would have to do more work to get the oil around the engine block.

Can I use 15w40 instead of 10W40?

A 10w40 oil will be thicker in the cold than 15w40 oil, but they will have the same viscosities at higher temperatures. So during the cold season 15w40 being the lighter weight engine may provide better fuel efficiency provided that the engine can sustain thinner and lighter oil.

What oil is heavier 10W30 or 10W40?

The quick answer is 10W40 is a thicker engine oil than 10W30 at higher temperatures. Both have almost the same characteristics, and the only difference is the oil viscosity.

Is it OK to mix 5W30 with 15w40?

You aren't supposed to mix weights. If you don't have anything else to replace 5W30, use only 5W30, according to the owners manual. If you are unsure about mixing different weights, check out Bob Is the Oil Guy.

Can you mix SAE 30 with 15w40?

These two oils are completed mixable at any ratio.