You might be familiar with terms such as “30-weight” or “10W-30” oil. Those numbers refer to the grade. The higher the number, the thicker the oil. The lower the number, the thinner.
What oil is thicker 5w30 or 10w30?
10w30 is thicker then 5w30 because it has a higher viscosity in low temperatures. The engine oil will flow slower than 5w30 during the cold season. Thicker or higher viscosity metal oil has a better seal compared to low viscosity oil.
Which is thicker 10w30 or 10w40?
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. … Remember that using oil with a viscosity that is too high can result in excessive oil temperature and increased drag.
Is 5w30 thicker than 5w40?
The working viscosity of 5w30 is basically from 9.3 to 12.5mm2/s whereas the operating viscosity of 5w40 is 12.5 to 16.3mm2/s. That means 5w40 has larger viscosity than 5w30.
Should I use thicker oil in an older engine?
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.
What happens if you put 10W40 instead of 5w30?
Originally Answered: What happens to engine if I use 10W40 instead of 5W30 (Manufacture recommended)? … If it is a modern engine damage will occur gradually . 10W40 is too thick and won’t flow easily when cold. First damage will be in the cylinder head.
Will 5w30 hurt a 0w20 engine?
No, not true. A 5W-30 full synthetic will flow fine. If you look at the owner’s manual for the same Toyota engines in many other countries, they specify 5W-30 for better engine longevity. The reason why they specify 0W-20 (and new cars are trying to go lower such as 0W-16) is for better gas mileage.
When should I use 10W40 oil?
This is the reason your location is so important in selecting which oil to use. Between a 10W-30 and 10W-40, 10W30 motor oil would run smoother in colder climates while a 10W40 would be more effective in preventing engine wear and tear in warmer temperatures.
Is 10W40 good for high mileage?
Mobil 1 High Mileage 10W-40 motor oil is recommended by ExxonMobil for use in high mileage vehicles (even those that have used lower quality conventional oils†), including: Cars. Trucks.
Will thicker oil damage my engine?
Not only that, but the engine will waste energy pumping the thicker motor oil, reducing fuel economy. Since thicker oils don’t transfer heat as well as thinner oils, operating temperatures will increase, too, possibly leading to accelerated chemical break down and harmful sludge and deposits.
What happens if I use 5w40 instead of 5w30?
In practice, this means that each oil is just as viscous at lower temperatures and will remain viscous at -30°C, however 5w40 oil outperforms 5w30 oils at higher temperatures, being effective up to temperatures of 50°C, as opposed to 30°C.
Is it OK to mix 5w30 with 5w40?
5W30 and 5W40 oils can be mixed. For example, if you have a sharp drop in the fluid level on the road and there is no supply of 5W40 synthetics, but there is a similar fluid with a similar label and markings, but from an outside manufacturer, in this case, your manufacturer’s 5W30 oil will help you.
Can I switch from 5w40 to 5w30?
In most cases, if they recommend SAE 5W-40, then SAE 5W-30 may cause problems with wear or even engine damage. SAE 5W-40 will always be “Thin” enough at any temperature, but SAE 5W-30 may be too “Thin” at high temperatures.
When should I use 20W50 oil?
20W50 motor oil is suitable for warmer climates, where the higher temperature causes the oil to thin. It is also useful for vehicles subject to hot temperatures and for those used for high-stress activities such as hauling or pulling trailers.
Is it OK to use 5W30 oil instead of 5W20?
Using 5W30 oil for your vehicle will not blow out the engine. … Your vehicle runs best at 5W20 and this is the type of oil that is recommended by the manufacturer; I always advise customers to use the type of oil that the manufacturer recommends.
Do high mileage cars need thicker oil?
High-mileage motor oil doesn’t hurt and it could prevent leaks from starting. … Some mechanics recommend switching to a thicker (higher viscosity) oil — such as 10W-30 full synthetic oil instead of 5W-20 full synthetic — or using oil additives to stop leaks.