Quick Answer: Can I Mix 10w30 With 15w40?

Can you put 15w40 in a 10w30 engine?

DON’T SACRIFICE WEAR PROTECTION FOR FUEL ECONOMY Therefore, high quality additives are needed to compensate for those weaknesses in order for a 10W-30 engine oil to protect as well and last as long as a 15W-40.

High quality 10W-30 oils can perform as well, and better than industry-standard 15W-40 oils..

Can I mix 5w30 with 15w40?

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 ! No, you won’t blow a head gasket, but 15W40 is too heavy an oil to use where 5W30 is required.

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.

What happens if you put 10w40 instead of 10w30?

A 10W30 engine oil will still be able to protect your engine, but it will thin out very fast that it may no longer be able to prevent the metallic moving parts from scraping against each other. As such, you will have a much better chance of protecting your engine if you use a 10W40 in hot weather conditions.

Is Rotella 15w40 good for gas engines?

Rotella oils like T3 15w-40 meets both the API CJ-4 and SM specifications, and may be used in both gasoline and diesel engines. However, it is formulated specifically for vehicles without catalytic converters, containing phosphorus levels beyond the 600-800ppm range.

Can I use 10w 40 instead of 15w40?

( the whole 10w-40’oil draining away faster’ thing is nonsense because once hot, a 10w-40 and a 15w-40 are exactly the same viscosity and will drain at exactly the same very fast rate until the engine has cooled.

Is diesel oil bad for gas engines?

Diesel oils have to put up with much higher engine temperatures, higher oxidation rates, sulfur deposits, fuel soot, acids and other deposits and conditions not usually found in automobile engines. So it would make sense that using diesel oil in a gasoline engine would enhance the latter’s longevity.

Can you mix 10w and 15w oil?

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.

Which oil is thicker 15w40 or 10w40?

Viscosity or thickness of the oil increases with rise in temperature. A 10W40 oil will be thicker in the cold than 15W40 oil, but they will have the same viscosities at higher temperatures.

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.

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.