Which is thicker 15w40 or 20w50?
The higher the number the thicker the oil so in this case 15w40 oil will be a thinner oil. When you say which is better it depends on what the oil is for if it is for a car engine a oil which is 30 or 40 will better to use than a 50.
Which oil is thicker 15w40 or 20w50?
The higher the number the thicker the oil so in this case 15w40 oil will be a thinner oil.
Can I use 20w50 instead of 15W-40?
20W-50 motor oil is for vehicles with gasoline engines. 15W-40 oil is for diesel applications. The difference between the two grades are just the specifications and for all practical purposes, in older vehicles without variable valve timing, the two grades of oil are interchangeable.
Which oil is better 20W40 or 20w50?
But even so, both vary in their properties. The main objective of engine oil is to support the engine’s smooth performance with proper lubrication and cleaning. 20W40 is suitable for hotter climates and will not cause sludge as opposed to 20w50 which is more appropriate for hotter conditions.
Which oil is thicker 20W40 or 20w50?
Both are the same when cold (in this context cold means the temperature at which cold tests are done). When hot (again, hot tests, which are 100+ Celsius), 20W50 will be thicker. As 20W50 is actually heavier oil than 20W40.
What is 20W 50 viscosity?
Typical Properties
| Mobil Special | 15W-40 | 20W-50 |
|---|---|---|
| Viscosity | ||
| cSt at 40°C | 108 | 154 |
| cSt at 100°C | 14.9 | 19.0 |
| CCS, cP | 5360@-20 | 9080@-20ºC |
Is 20W50 good for high mileage?
Is 20W-50 Oil Good For High Mileage? 20W-50 is only used for certain older vehicles or worn engines that require the extra cushioning of a high viscosity oil. Other than that, it really isn’t a high mileage oil.
What happens if we use 20W50 instead of 20W40?
20W50 will hold on to the viscosity marginally better than 20W40 when the engine gets hot. However, 20W50 mineral oil will cause more sludge than a similar 20W40 because 20W50 will have more viscosity improvers. Pulsar 150’s manual recommends 20W40, but you can use either, not much of a difference.