Most motor oils are made from a heavier, thicker petroleum hydrocarbon base stock derived from crude oil, with additives to improve certain properties. The bulk of a typical motor oil consists of hydrocarbons with between 18 and 34 carbon atoms per molecule.
What is motor oil used for in the engine?
Motor oil provides lubrication to the many moving parts of an engine, which helps to avoid damage and keep your engine running smoothly. Each time your engine runs, by-products from combustion are collected in your engine oil.
Which engine oil is used in cars?
Conventional oil is the most commonly used type of oil. It is ideal for light-duty, late-model cars with low to average mileage and a simple engine design.
Is Thicker oil better for high mileage cars?
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.
Does engine oil expire?
Under optimal conditions (stored in the original, unopened containers at moderate temperatures), motor oil usually remains stable for an extended period of time. The oil has to be replaced. … That said, an engine oil’s properties are best if it is used within two years.
How many types of engine oil are there?
Motor oil can be segmented into four basic varieties—synthetic oil, synthetic blends, high mileage oil, and conventional oil.
What happens if I use 5W40 instead of 5W30?
In case 5W30 has lower viscosity for the hot running engine. The viscosity rate between the 5W30 and 5W40 is the same at 5 grade. … 5W40 has an efficient and higher viscosity than 5W30, which helps start the engine during the summer temperature and helps thoughtfully running a car.
Can I use 5W30 instead of 15W40?
If the manufacturer’s recommendation for your engine allows you to use 5W30 oil, you can use either 5W30 or 15W40. If your engine only calls for 15W40, please only use that grade of oil; big engines are too expensive to risk.
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.
What is the difference between 5w30 and 5w40?
5w30 is engine oil that has lower viscosity 5 and higher viscosity 30. 5w40 is engine oil that indicates the weight and viscosity of the engine. Its lower viscosity is 5 and higher viscosity is 40. … 5w30 has lower viscosity hence it is suitable to use in hot or lower temperatures.
Which engine oil is best for old car?
When you’re choosing the best oil for older cars or high mileage engines, there are several criteria you can look at.
- Pennzoil High Mileage Conventional Motor Oil. …
- Castrol GTX Part-Synthetic High Mileage. …
- Valvoline MaxLife High Mileage Synthetic Blend. …
- Mobil1 High Mileage Engine Oil. …
- Amsoil Premium Protection Motor Oil.