What is SAE 10W-40 oil used for?
This oil weight is commonly used in diesel engines or in a smaller motorcycle engine too. The 10W-40 oil viscosity also often serves as an alternative for older engines with burning or oil leaking issues.
What does SAE 10W-40 mean?
The designation “10W-40” indicates a multigrade oil that is toward the low end of the SAE scale in cold weather, but at the upper end in hot conditions. 10W-40 oil is therefore good for a wide range of weather conditions.
Is SAE 10w40 synthetic?
Semi-synthetic oils such as 10W40 have long been the standard. Their base is refined crude oil, which is then blended with additives.
Is 10w40 a good oil?
Both 10W-30 and 10W-40 are low-viscosity oil grades that contain polymers, which speed up or slow down the engine oil’s thickening or thinning rate, depending on oil temperature fluctuations. Either 10W30 or 10W40 for summer use is fine; however, 10W-40 motor oil will better protect your engine.
Can I mix 10w40 with 10w30?
You will be fine with that. They will mix right in with each other and no harm will be done. Even if you were to mix syn with conventional you’ll be fine. If you were to labratory test your oil it will read out as not a true 10w-30 but no harm will be done.
Can you substitute 10w40 for 10w30?
If both 10w30 and 10w40 are acceptable oil options for your car, it’s recommended that you use 10w40 for your car with high mileage. 10w40 is more viscous than 10w30. The thicker oil helps older engines handle higher temperatures and manage wear and tear more efficiently.
How does multi grade oil work?
A multigrade oil is an oil that meets the requirements of multiple grades — one “W” grade and one single grade, e.g., 5W-30 or 15W-40, etc. This grading system has the advantage over the ISO system in that it defines the viscosity performance of the oil at both the low-temperature range and the high-temperature range.
Can I use 10w40 in my petrol car?
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.
What happens if I put 10w40 instead of 10W30?
The basic fact that “40” is greater than “30” tells you that. If you were to put 10W40 in an engine designed for 10W30, the “thicker” oil would lead to friction in the engine and an increased load on the oil pump. The car would have to do more work to get the oil around the engine block.
Does 10W40 hurt 10W30 engine?
If you were to put 10W40 in an engine designed for 10W30, the “thicker” oil would lead to friction in the engine and an increased load on the oil pump. The car would have to do more work to get the oil around the engine block.
Why do we use SAE 10W-40 multigrade viscosity?
Wide-range SAE 10W-40 multigrade viscosity ensures reduced friction at start-up and maximum lubricity at high operating temperatures.
When did they start using multigrade engine oil?
In the 1960’s, long chain polymers started to be used in engine oils to improve the oils viscosity index (basically meaning the oils were effective over a much wider temperature range). This led to the creation of multi grade engine oils (like 10w40 or 15w50 ), which is the type of engine oil used by most modern motorcycles.
Which is the best multigrade lubricant for a diesel engine?
Delo® XLD Multigrade SAE 10W-40 is a high performance multigrade diesel engine lubricant. Reduced maintenance costs Highly effective detergent additive system minimizes piston crown land deposits which can lead to damaging bore polishing. High base number minimizes corrosive wear in those areas where medium to high sulphur fuel is still encountered
What is the viscosity of SAE 90 gear oil?
As a very rough guide, SAE 90 gear oil has the same viscosity as SAE 50 engine oil Multi Grade oil (e.g. 10w40)… In the 1960’s, long chain polymers started to be used in engine oils to improve the oils viscosity index (basically meaning the oils were effective over a much wider temperature range).