Is 10W-40 oil OK for petrol engine?

It's guaranteed to be safe to use in both petrol and diesel engines which require 10W-40 fuel, and quality is assured thanks to our superior testing and development process. 10W-40 oil is commonly used in diesel engines, as well for motorcycles and older cars that have a history of oil leaks.

Can I use 10/40 oil in 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.

What is 10W-40 motor oil good for?

Higher viscosity oil such as a 10W-40 can be useful for older engines burning or leaking oil. We offer Mobil™ 10W-40 high viscosity motor oils for use in vehicles with more than 75,000 miles, and a synthetic blend oil when cost is a consideration.

When should I use 10w40 oil?

So, if you drive in a warm climate — especially more than 32°C (90°F) — or have an engine that runs hotter than others, 10W-40 oil viscosity is a good option. This higher viscosity oil is designed for hotter temperatures and can handle the added heat stress from the environment.

Is it OK to use 10w40 instead of 10W30?

The short answer is yes. Because both oils are formulated to give the same performance, it will be safe for you to use either oil. Some differences between the two oils include viscosity and base oil.

Castrol 10w-40 oil explained | Which oil for my car? | Castrol U.K.

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.

Is 10W-40 too thick?

Bear in mind that mixing motor oils may affect your vehicle's warranty and fuel consumption. Although both 10W-30 and 10W-40 lubricants function the same during cold startups, one is slightly thicker than the other and would be less practical for certain high ambient temperatures.

Is 10W40 fully 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 better than 5w30?

The 5w30 oil will flow better at low temperatures than the 10w40 oil. This means that the 5w30 oil will protect the engine better at low temperatures, usually when the engine is just starting or during weather conditions such as winter.

What's the difference between 10W-30 and 10W-40?

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.

What is the best 10w40 engine oil?

Castrol EDGE, an advanced full synthetic 10W-40 motor oil, is Castrol's strongest oil and a great option for those who want the very best for their car. Castrol GTX MAGNATEC is a premium full synthetic 10W-40 that offers superior wear protection.

Will thicker oil damage my engine?

It's best to use the oil viscosity recommended in the owner's manual, but using a slightly thinner or thicker oil (lighter or heavier viscosity) generally poses no long-term harm.

Will the wrong oil damage my engine?

Cause damage to engine life

The wrong engine oil can cause engine damage because it does not properly lubricate its components. This will lead to metal-on-metal contact since the moving parts are not being lubricated. Friction quickly follows, causing engine parts to wear.

Is Thicker oil better for older engines?

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.

What does 10W-40 mean in oil?

10W-40 is the viscosity, or weight, of the motor oil as defined by the Society of Automotive Engineers (SAE for short). A 10W-40 oil has a viscosity grade of 10W at a low temperature and 40 at a higher temperature. What does this mean, exactly? Motor oil thickens when it's cold and becomes thinner when heated up.

What is the best engine oil for hot weather?

There are a few ways to get your car prepared for summer with synthetic oils. If you're capable of changing your oil, you can find synthetics at auto retailers. Look for containers with codes such as 0W-20, 5W-20, and 5W-30. These correspond to specific synthetic oil mixtures approved for standard vehicles.

When should I use thicker oil?

There are some circumstances where drivers have used thicker oil in an engine. If, for instance, clearances between engine components have increased, gotten sloppy, a thicker oil can help to fill the void. Within reason, thicker oil maintains a better lubricant film between moving parts.

What kind of oil do small engines use?

SAE 30- Warmer temperatures, most common oil for small engines. SAE 10W-30- Varying temperature range, this grade of oil improves cold-weather starting, but may increase oil consumption. Synthetic SAE 5W-30- Best protection at all temperatures as well as improved starting with less oil consumption.

What oil is best for high mileage cars?

What oil is better for older cars?

Monograde oils are still widely available, primarily because they're used in very hot climates, or in heavy-duty applications such as mining or construction equipment. These single-grade oils can be used in 1950s and older cars – generally SAE 30 to SAE 50 – but most owners use multi-grade.

How long does 10w40 oil last?

Unopened Motor Oil

This will give you about 2-5 years before unused oil becomes unfit for consumption. Unless you need to use the oil, do not open the oil bottle at all. Keep in mind, though, fresh oil will degrade over time and lose its oil additives properties, impacting the oil life.

Is thinner engine oil better?

Thin oils reduce friction in engines and help engines start quickly during cold weather. Thick oils are better at maintaining film strength and oil pressure at high temperatures and loads.

Can I mix 5w40 and 10w40?

If you have drained the engine oil and plan on replacing it with the 5W-40, the small remainder of the 10W-40 will mix in with this new oil.

Should I use 5W or 10W oil?

Absolutely yes for car engines, 5W-30 is usually synthetic and superior to 10W-30. Both have the same viscosity at the operating temperature of an average car engine. 5W has lower viscosity when cool and is considered better for the car engine during engine start.