Oil with a 5W-30 grade thins out more quickly at high temperatures as compared to oils with a 5W-40 grade. During winter and for cars used in cooler regions, your engine will benefit from using oil with low winter viscosity.
What grade of oil is best for my car?
The recommended conventional oil is typically 5W-20 or 5W-30 for lower temperatures or 10W-30 for higher ambient temperatures.
Should I use SAE 30 or 10w30?
Older engines can use the SAE30, while the 10W30 is for modern engines. Again, the SAE30 is better for warmer temperatures while the 10W30 is suitable for varying temperature ranges and also works well in cold weather.
Which is better 10W40 or 15W40?
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.
What happens if you use the wrong grade of oil?
The brand of motor oil matters little, but its viscosity grade (10W-30, for example) is important. Use only what the owner’s manual specifies. Using the wrong oil can lead to reduced lubrication and shorter engine life. If the manual says to use synthetic oil, do so.
Can I use 10W40 instead of 5w30?
Your vehicle does not use 5W-30 oil. 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.
Should I use thicker oil in a high mileage 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. … The engine does not leak and I’ve never seen a whiff of blue smoke.
Is SAE 30 thicker than 10W30?
SAE 10W30 is an oil that has SAE 10W viscosity(thickness) at low temperatures, and SAE 30 viscosity at high temperatures. The W stands for ‘Winter’. At operating temperature, there’ll likely be little difference between SAE 30 and SAE 10W30. In theory, they’re the same at high temperature, which is IIRC set at 100C.
Which is thicker SAE 30 or 10W30?
If there is only one number, it has only viscocity, whereas two numbers indicate two viscositiesat two different conditions. No 30w stays 30 weight at all times. 10w30 acts like 10w and is thinner in a cold engine, and like 30 weight, thicker, when the car is hot.
Can I use 10W30 instead of SAE 30 in my lawn mower?
Not only can you use 10W30 over SAE30 motor oil in your lawn mower, but it is a great idea. SAE30 motor oil is perfect for warm temperatures, however. With that said, 10W30 motor oil performs well in both cold and warm temperatures, so it is a better choice than SAE30.
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.
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.
What is the best 15W40 oil to use?
For anyone who needs a good diesel motor oil to help boost their engine’s performance and fuel efficiency, we recommend the Royal Purple 15W-40 Oil. If you want to save some cash and still invest in one of the best diesel oil’s on the market, go for the Shell Rotella T6 Synthetic Diesel Motor Oil 5W-40 CJ-4.
What if I put 5w20 instead of 5w30?
If you put in 5W-30 oil instead of 5W-20 when the latter is the grade suggested by your vehicle’s manufacturer, damage to internal engine parts can occur. Additionally, your engine may experience performance issues such as diminished fuel economy and horsepower.
Can I use 5W 30 instead of 0W 20?
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.
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.