Can I Mix 15w40 With 10w40?

Does 10w40 hurt 5w30 engine?

The recommended oil viscosity for your vehicle, according to Kia documentation, is 10W-40.

If you drive the vehicle in exceptionally cold weather, well below 32 degrees, you can use 5W-30 oil but even 10W-40 is still perfectly OK to use if outdoor temperatures are below freezing..

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. 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.

Can you mix 15w50 with 10w40?

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.

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 is the best 15w40 oil to use?

Top 5 Best Diesel Engine Oil of 2020Castrol EDGE Extended Performance 5W-30. Castrol is a name synonymous to quality and high-performance. … Valvoline 5W-40 Full Synthetic Diesel Engine Oil. … Royal Purple API-licensed Motor Oil SAE 15W-40. … Shell Rotella T4 Triple Protection 15W-40. … Mobil 1 120760 Synthetic Motor Oil 0W-40.

Is 10w40 good for high mileage?

The slightly thicker oil film from the heavier base weight oil – 10W – can help protect worn engine bearings as well. As long as you’re not hearing knocking or serious mechanical noises from the engine, the heavier oil should buy you many more miles of service from your vehicle.

Is it bad to mix 10w30 with 10w40?

You will be fine with that. They will mix right in with each other and no harm will be done. Even if you were to mix syn with conventional you’ll be fine. If you were to labratory test your oil it will read out as not a true 10w-30 but no harm will be done.

Can you mix 10w and 15w oil?

As the additive formula used to construct each viscosity (10W-30 and 15W-50 in this case) can utilize different chemistry, there simply is no way to project how well the mixture will actually work and whether the longevity of the oil mix will be affected.

Can I mix 20w50 with 10w40?

You can mix most oils and won’t see any problems.

Can you mix 15w40 with 15w50?

Penrite has got the “extra-TEN” labelling, which explains if you normally used 15W-40 you can step up to their 15W-50 with no problems.

Is 10w40 good for winter?

Yes, although they are both technically 10w oils, a 10w-40 is much thicker in cold conditions compared to a 10w-30.