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The numbers 0, 5, 10, 15 and 25 are suffixed with the letter W, designating they are “winter” (not “weight”) or cold-start viscosity, at lower temperature. The higher numbers of a gear oil (e.g., 75W-140) do not mean that it has higher viscosity than their viscosity characteristics.
What does the W number oil mean?
The short answer:The numbers represent the viscosity of the oil and the W stands for WINTER. The lower the number, the thinner the oil and the better the oil’s cold temperature/ cold start performance. The number after the W describes how thick the oil is at the engine’s normal operating temperature.
Is 5W-30 oil thicker than 10w30?
So both the oils 5W–30 and 10W–30 have exactly the same viscosity (SAE 30) when your engine is running, and will perform in the same way. However, the 10W–30 oil will be thicker (higher viscosity) than the 5W–30 when it is cool.
What does the W stand for in 5W-30 oil ?’?
The “W” stands for “winter,” the number preceding it indicates the oil’s viscosity (or thickness) at low temperatures (hence the W), and the number after it indicates viscosity at higher temperatures, when the engine is running.
What does the W mean in gear oil?
Viscosity of gear oils designated with a number followed by the letter “W” (SAE 70W, SAE 75W, SAE 80W etc.) was specified at the temperature 0°F (-18°C). The letter “W” means winter. These grades are used at low ambient temperatures.
Can I use 10W 40 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.
Which is better 5W30 or 5w40?
5w30 can be used by different type of vehicles and in different range of temperatures, but is ideal for colder temperatures. 5w40 is often used in higher mileage engine sand performs better in warmer temperatures.
Is it OK to run 10w30 instead of 5W-30?
Most oils will mix perfectly, provided they have a similar synthetic. Therefore, there is no problem in mixing 10w30 and 5w30 since one will be topping up. Mixing the viscosity of oils will not have any effect on the engine. 5w30 and 10w30 engine oils have close viscosity, and thus there is no harm in mixing them.
Can I mix synthetic oil with regular oil?
Mixing them will not improve the performance or efficiency of your engine in any way. Adding synthetic oil to regular motor oil will not enhance the regular oil. Mixing regular motor oil with synthetic oil may dilute the benefits of the costlier synthetic oil.
What motor oil is best for hot weather?
What Are The Top-Rated Engine Oils For Summer? Valvoline Advanced Full Synthetic Motor Oil. Shell Rotella T5 10W-30 Diesel Engine Oil. Castrol 06246 Edge Full Synthetic Motor Oil. Valvoline High Mileage Oil With MaxLife Technology. Mobil 1 120762 Synthetic Motor Oil. Castrol 03094 GTX 10W-40 Conventional Motor Oil.
What does 10W30 mean?
Answered January 07 2020. The 10W30 designation on engine oil means that the viscosity of the oil is rated at 10W when an engine is cold and 30 when the engine is hot. This is different than an oil labelled 5W30, which has a thinner viscosity when the engine is cold at 5W.
Can I use 5w40 instead of 5W-30?
There’s not going to be much functional difference between a 5w-30 and 5w-40 as there’s a lot of functional overlap in the recommendations. The lower weight might yield better efficiency under light load operating conditions, but higher weight might yield better protection under higher load operating conditions.
Is 10W30 thicker than 10W40?
10W40 oil has a higher viscosity, retaining more thickness than 10W30 as the temperature rises. In that case, 10W-40 motor oil would technically provide better protection against engine wear contact in higher temperatures.
What is the W in 80W90?
80W-90. The numbers “80W-90” refer to the viscosity grades of the oil. Since it has two numbers, this oil has two viscosity grades. The ‘W’ means winter. The number “80” — in this case — signifies that the oil is designed to work well in lower temperatures.
Is SAE 90 the same as 80W-90?
Also: SAE 90 is a huge range. 80W-90 is the lower (less viscous) end of the scale, while 85W-90 is the top end of the scale. Both are monogrades (single grades).
What does 80W oil mean?
The “80W-90” numbers apply to oil viscosity. This oil has two numbers and has two grades of viscosity. ‘W’ refers to winter stability. In this situation, the amount “80” means that the oil operates better at lower temperatures. The second number, that is, 90, indicates how thin the oil must be at 100°C.
Should you put thicker oil in an older engine?
Older engines use more oil, but it gives them a better fuel economy. Older engines with more than 75,000 miles on them require a thicker oil that will lubricate their critical engine parts and prevent oil leaks, sludge, and deposits from forming.
Is 10w-40 thicker than 5W-30?
A 10w-40 motor oil is a thicker oil at startup than a 5w-30 motor oil. Therefore, 10w-40 oil clings to the engine’s moving parts more than the lower viscosity 5w-30 oil.
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.
What does 0w40 mean?
CHOOSING the right 0W-40 oil for your car. It actually stands for Winter. That’s because 0W-40 engine oil is formulated to flow like a 0 Weight oil in cold conditions, yet offer the protection of a 40 Weight motor oil when the engine reaches its full operating temperature.
Is 5W-40 thicker than 5W-30?
5w30 is engine oil that has lower viscosity 5 and higher viscosity 30. 5w40 oil is not thicker has it has a higher viscosity. Temperature. 5w30 has lower viscosity hence it is suitable to use in hot or lower temperatures.
Is 5w40 good for high mileage cars?
According to Mobil Oil’s website, a heavy grade 5W-40 oil is best for use in vehicles that hold a diesel motor with high mileage. The use of heavy grade 5W-40 oils help to extend the life of diesel engines by protecting the engine against leaks, Z.
