Quick Answer

Question What happens if I use 10w40 instead of 10w30?

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.

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.

Is 10w40 good for high mileage?

Is 10w40 Good For High Mileage? The 10w30 and 10w40 oil options are both acceptable for your car, but if you have a high mileage car, you should use the 10w40 oil. Older engines are able to handle higher temperatures and wear and tear more efficiently with thicker oil.

Is 10w30 better for high mileage?

10W-30 motor oil makes for a decent high-mileage oil. It gives a better fuel economy while reducing the oil consumption for older engines. Older engines with more than 75,000 miles on them require a thicker oil that will properly lubricate their critical engine parts and prevent oil leaks, sludge, and deposits.

Is 10W40 oil thicker than 10W30?

The viscosity of hot oil is measured using different test parameters than when the oil is cold, so the numbers after the “W” don’t relate to the numbers in front of the “W”. 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.

Is 10W30 good for summer?

As a general rule, you’ll get the best protection in the summer when you use a slightly thicker grade of oil, such as a 10W30 instead of a 5W30. Engines need a thicker oil in the summer months because of the summer heat and its effects on thinning the oil out.

What does 10W30 stand for?

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.

Is 10W30 good for winter?

Can I Use 10w30 In Winter? The 10W flow is good in cold weather, so it protects the engine at start up, but it is too thin for use in the summer when the engine is at full power. The recommended oil for summer use is a 30 grade oil that is thick enough to protect against heat.

What is 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. Why is that? The 10W-40 engine oil has a thicker viscosity than, say, 10W-30 oil when the car engine is hot.

Which is better 10W-40 or 5w 40?

5W40 vs 10W40 – Differences

The 5W40 is thinner than the 10W40 at lower temperatures. But when the temperature is higher, both motor oils similarly perform their intended functions (using the same viscosity). If your motorcycle requires a 10W40 engine oil, there is no need to go for 5W40 oil.

Which engine oil is good for old engine?

Which oil is best for old engines? It is the Valvoline MaxLife 10W-40 oil that stands out as the best for motors that are old. The additives in Valvoline are enhanced. Your motor will perform better when you use the additives.

Is 10w40 better for older cars?

Is 10w40 Better For Older Cars? When you put more pressure on your vehicle’s engine at high temperatures, 10w40 will reduce wear and tear on the engine and make it more durable. 10w40 is also an excellent choice for older vehicles.

Is 10w30 good for older engines?

Engine oils are more characterized by viscosity. Both 10w30 are thicker and suitable for heavy-duty and older engines.

When should I use 10w30 oil?

It also provides a better cold temperature start than 10W-30 oil. On the other hand, the slightly thicker oil,10W-30, provides better lubrication for commercial vehicles and heavy-load engine cars. Even though this multi grade engine oil can be used in a colder temperature, it’s better suited for warmer weather.

What is 10W-30 oil good for?

This means the viscosity is at 10W when the engine is cold and 30 when the engine is hot. Low viscosities are good for cold temperatures (hence the “W” association) because the oil is thinner. Thinner motor oil flows more easily and moves quickly.

What temperature is 10w30 oil good for?

Both 5w30 and 10w30 are multi-grade products. This means they are designed to perform at both cold starting temperatures and normal operation temperatures of 210° F without sacrificing performance.

What oil can I use instead of 10w30?

Which Oil Is Better 5w30 Or 10w30? The 5w30 oil is a great multigrade oil that can be used in low starting temperatures and high summer temperatures. In addition, it is more fuel efficient since it reduces the drag on the bearings and engine parts, which reduces fuel consumption.

Is higher viscosity oil better?

Thin, low viscosity oils flow easier to protect engine parts at cold temperature. Thick, high viscosity oils are typically better at maintaining film strength to protect engines at high temperatures.

What is the best oil for hot weather?

6 Top Best Motor Oils For Hot Climate Like Florida And Comparison

Castrol 06246 Edge Full Synthetic Motor Oil 9.1
BEST BUDGET Valvoline High Mileage Oil With MaxLife Technology 8.8
Mobil 1 120762 Synthetic Motor Oil 8.6
Castrol 03094 GTX 10W-40 Conventional Motor Oil 8.2

Can I use 10w30 instead of 5W30 in summer?

The answer is yes. You can use 10w30 instead of 5w30 oil since both meet the SAE standard for viscosity at operating temperature. Generally, the viscosity difference between the two is neglectable.

Is SAE 10W30 the same as 10W30?

The short answer to this is no, 10W-30 oil is not the same as SAE 30. The difference between 10W30 multi – grade and straight grade oil is that it has been formulated to provide a 10W viscosity at very low temperatures to aid in cold-cranking in heavy engines.

What is the thickest engine oil?

What Engine Oil Is The Thickest? The Society of Automotive Engineers (SAE) developed a viscosity scale in order to measure the viscosity of engine oil. A rating of 0W, the thinnest type of oil, is followed by a rating of 60, the thickest.

Which is better 10W30 or 20w40?

20w40 is thicker at high temperatures than 10w30 It is desirable for lubrication at operating temperatures to be high. 20w40 is better than 10w30 at normal operating conditions.

Is 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. However the market is moving towards synthetic oils.

What is 10W 50 oil used for?

10W50 oil is a high-performance engine oil that offers outstanding engine reliability and temperature stability under extreme driving conditions. It’s used for a wide range of motorsports and modern engines with turbochargers.

Is 10W-40 OK for my car?

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.