Quick Answer: Which Oil Is Thicker 10w40 Or 15w40?

Can I mix 10w40 with 10w50?

You can mix the two oils and based on the proportions you can figure what the product is.

Say you mix two 10W50 with two 10W40..

Which oil is thicker 10w30 or 15w40?

For example, a 5W-40 oil will be thinner in cold temperatures than a 15W-40, but at normal operating temperatures both oils will flow the same. However, when you compare a 10W-30 vs a 15W-40, at both low and high temperatures the 10W-30 will be thinner, with less resistance to flow.

Can I mix 5w30 with 10w40?

As posted above, mixing 5w30 with 10w40 will give you an oil that performs somewhat better in the cold than 10w40, but less good cold than 5w30, and that has a viscosity a bit higher than 5w30 but a bit lower than 10w40. … Mixing different oils will not improve the performance or efficiency of the engine in any way.

Is it bad to mix 10w40 with 20w50?

Re: 20w50 and 10w40 mix The filter holds a good amount of oil, so yes, you will be mixing two different grades of oil which can lead to it congealing and cacking up all your oil ways.

Is 10w 40 too thick?

Multi-grade oils could stay as close to the optimum viscosity over a range of temperatures – not too thick when it is cold and not too thin when it is hot. … The difference between 10W-30 and a 10W-40 is the high temperature viscosity. Obviously, a 10W-40 is thicker than a 10W-30 at high temperature.

What oil is thicker than 10w40?

The difference between 10w30 and 10w40 is the thickness of the oil at operating/high temperatures, at which 10w40 is thicker than 10w30.

Which oil is thicker 15w40 or 20w50?

20w50 is thicker at both low and high temps than 15w40. Kruzin – Other way around on the hot vs cold. A 15W-40 is designed to measure the same as a hot 40 weight when hot, and the same as a cold 15 weight when cold. Still thicker when cold, however.

What is the best 15w40 oil to use?

For anyone who needs a good diesel motor oil to help boost their engine’s performance and fuel efficiency, we recommend the Royal Purple 15W-40 Oil. If you want to save some cash and still invest in one of the best diesel oil’s on the market, go for the Shell Rotella T6 Synthetic Diesel Motor Oil 5W-40 CJ-4.

Is 15w40 better than 10w40?

A 10W40 oil will be thicker in the cold than 15W40 oil, but they will have the same viscosities at higher temperatures. The winter viscosity number dictates cold-start performance. … 10W40 oil will perform cold starts better than 15W40 oil.

Can I mix 10w30 with 15w40?

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.

What happens if I use 15w40 instead of 5w30?

5w30 provides best cold start properties. Using 15w40 instead of 5w30 will increase your fuel consumption because of more load on your engine’s crank. No it won’t blow off,you will just wear your engine out quicker because the oil won’t flow to the moving parts as quickly !

Is 10w40 good for high mileage?

A: Yes. This is a practical method to improve oil pressure in an older, high-mileage engine. The slightly thicker oil film from the heavier base weight oil — 10W — can help protect worn engine bearings as well.

Can you mix 10w40 with 15w40?

If both have the same specs bar the 10W then it wont hurt 10W means at 10 degrees and 15W 15 degrees outside temperature, so adding 10w wouldn’t do much in temperature wise as long as both are semi or so on with the same API specs.

When should I use 15w40 oil?

ADVANTAGE 15W-40 HEAVY DUTY DIESEL ENGINE OIL can be used with complete success in over-the-road diesel trucks, off-highway diesel equipment, farm tractors, and passenger cars and light trucks with diesel, turbo-charged diesel engines, or gasoline engines and is backward compatible with previous API Oil Categories.

What temperature is 15w40 good for?

“Diesel has the widest performance range with 5W40,” says Mark Betner of Citgo. “Its starting temperature range is down to minus 22 F (compared with 15-plus with 15W40) up to 122 degrees F (same as 15W40).