What is thicker 10W-40 or 15W-40?

What is thicker 10W-40 or 15W-40?

When it’s cold, 15W40 is only heavier than 10W40. The thickness over temperature is referred to by the two numbers. They are the same weight in hot weather.

Is Castrol a 15W40?

If you need a 15W-40 diesel oil, Castrol GTX helps extend engine life, protecting against the wear and tear of severe weather, rough roads and heavy tows.

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 is better 15W40 or 10w30?

Because 10W-30 is thinner than 15W-40 oil, its film strength can be weaker and it can be more prone to oxidation. High quality 10W-30 oils can perform as well, and better than industry-standard 15W-40 oils.

Which is better 10w50 or 15w40 diesel oil?

15w40 “diesel” oils tend to have more additives (like zinc) as well as more detergents. That’s what makes them better. The 15w40 oils seem to make all Mercedes — gas or diesel — a little happier. Down here, however, my 450SL prefers 20w50. It tends to find ways to leak 15w40 more readily in the heat!

Which is better Valvoline Oil or Castrol Oil?

Valvoline is better in some areas, the same as Castrol. For example, it has the best conventional motorcycle oil suitable for cruisers. On the other hand, Castrol has products that guarantee the engine’s long life, courtesy of Magnatec technology.

What happens if you use 10W40 oil in cold weather?

If you use 10W40 oil during periods of a cold engine running, the molecules of this specific oil might be too big to enter between the metal parts of the engine for proper lubrication, hence leading to damage. The worn-out engine may result in low-temperature leaks of oil.

Which is better 10W 30 or 10W 40?

There are some excellent dino oils but not as many in the 10W-40 weight (vs. 10W-30). As indicated above, temperature range is a very important consideration. Most HDEO’s are fine year-round except in very cold climates.