What Happens If You Put 10W40 Instead Of 10W30?


So, 10w40 is thicker than 10w30, and it provides better engine protection in hot temperatures. But if you use 10w40 instead of 10w30 in a 10w30 engine, it will just increase friction and oil pressure. Consequently, your engine will get damaged by friction.

Which is more fuel efficient 10W30 or 10W40 engine oil?

Technically, a lighter weight oil will provide better gas mileage as it’s lower viscosity makes it easier to move through the oil system. However, the difference between 10W30 and 10W40 will be indistinguishable.

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 is 10W-40 Good For?

The 10W-40 engine oil has a thicker viscosity than, say, 10W-30 oil when the car engine is hot. This helps it lubricate older moving parts in high mileage engines while being less likely to leak.

Can I use 10w40 for 10w30?

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. Viscous 10w40 is more viscous than viscous 10w30. Older engines are able to handle higher temperatures and wear and tear more efficiently with thicker oil.

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 is 10W 30 oil used for?

What is 10w30? 10w30 is a multi-grade engine oil ideal for heavy-load engines because of its ability to withstand hot temperatures for a long time without compromising the performance of the engine. This engine oil has a viscosity grade of 10 in low temperatures and 30 in high 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. However the market is moving towards synthetic oils.

Can I use 10W40 instead of 10w30 in my motorcycle?

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.

What oil should I use for high mileage?

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.

Can too thick oil damage 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.

What is best oil for high mileage cars?

10 Top-Rated Oils and Additives for High-Mileage Vehicles

  • Valvoline High Mileage with MaxLife Technology Synthetic Blend Motor Oil.
  • Pennzoil High Mileage Motor Oil.
  • Slick 50 Recharged High Mileage Treatment.
  • Gumout Fuel System Cleaner.
  • Royal Purple High Mileage Synthetic.
  • Techron Fuel Cleaner.
  • Mobil Super High Mileage Oil.
  • Is 10W40 good for petrol engine?

    it has high protective properties for the engine, and although the brand says this 10w40 oil can be used on diesel and petrol cars, you should be using this one on petrol cars especially because of its protective additives.

    Which engine oil is thicker?

    SAE50 is higher viscosity (thicker) than SAE40, and so on. Straight-weight oils come in a wide range of viscosities. But your car operates (ostensibly) in a wide range of temperatures. When your engine is running at operating temperature, it does not matter too much if it is summer or winter.

    What does the W stand for in 10W40?

    In a 10w-40 for example the 10w bit (W = winter, not weight or watt or anything else for that matter) simply means that the oil must have a certain maximum viscosity/flow at low temperature. The lower the “W” number the better the oil’s cold temperature/cold start performance.

    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.

    Is 10W-40 thicker than 5W 30?

    Main Differences Between 5w30 and 10w40

    The 5w30 oil is much thinner than the 10w40 oil and on the other hand, the 10w40 oil is much thicker than the 5w30 oil. The viscosity of 5w30 at low temperatures is 5 whereas the viscosity of 10w40 at low temperatures is 10.

    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.

    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 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 happens if you put 5W30 instead of 10W30?

    Can you use 5W-30 instead of 10W-30? 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.

    What cars use 10W30?

    In addition to high-performance turbocharged, supercharged, multi-valve fuel injected engines found in passenger cars, SUVs, light vans, and light trucks, Mobil 1 10W-30 is recommended by ExxonMobil for all types of modern gasoline-powered vehicles.

    Is 10W-30 oil synthetic?

    Mobil 1 10W-30 is an advanced full synthetic motor oil designed to help keep engines running like new by providing exceptional cleaning power, wear protection and overall performance. Mobil 1 10W-30 meets or exceeds the requirements of the latest industry standards required by modern gasoline engines.

    What happens if I put the wrong oil in my car?

    Using the wrong fluid can cause poor lubrication, overheating, and possibly transmission failure. A mechanic might not be able to reverse the damage, even by flushing the transmission. Mistakenly adding motor oil or brake fluid can also destroy your transmission.

    What is 10W-40 engine oil?

    10W-40 10W-40 is the engine oil which offers a 10 weight performance in the cold starting temperature. On the other hand, it provides a 40 weight performance at the normal operating temperature of the engine.

    Which is better 5w30 or 10w40?

    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.

    Is Shell Advance 10w40?

    100% synthetic 10w40 engine oil. Makes gear shifting smooth, reduce vibrations.

    Why does Honda use 10W30?

    Honda 4 – Stroke Motorcycle Engine Oil SAE 10W30 MA

    This oil is environment friendly and reduced CO2 emissions results in lesser air pollution. Japanese technology and special formulation provides optimum engine protection ensuring longer engine life.

    Is 10W-40 good for motorcycle?

    Mobil 1 Racing™ 4T 10W-40 advanced four-stroke motorcycle engine oil helps provide an outstanding level of performance in today’s high-performance motorcycles. It helps keep four-stroke engines running clean, providing protection even in extreme operating conditions.

    What is the best 10W30 Motorcycle Oil?

    1-24 of 207 results

  • Mobil Super Moto 10W-30 API SN 4T Premium Technology Engine Oil for Bikes (1L)
  • GULF Pride Scooter SAE 10W-30 – Superior Performance 4-Stroke Engine Oil for Scooters [800 ML] – Pack of 1.
  • Motul 104062 5100 4T Hybrid 10W-30 API SM Technosynthese Semi Synthetic Engine Oil for Bikes (1 L)
  • Why can’t you go back to regular oil after synthetic?

    Myth: Once you switch to synthetic oil, you can never switch back. This is one of the most persistent myths about synthetic oil—and completely untrue. You can switch back and forth at any time. In fact, synthetic blends are simply a mixture of synthetic and conventional oils.

    Can you mix high mileage and regular oil?

    High-mileage motor oil.

    As you can see, each of these oils is scientifically formulated. Mixing them will not improve the performance or efficiency of your engine in any way. Nor will mixing improve the oil performance, either.

    Is it OK to use synthetic oil in high mileage cars?

    Your Mileage May Vary

    Naturally, every situation is different. However, if a vehicle has been well maintained and is in good running condition, synthetic oil may very well prolong its life.

    Does engine oil get thinner over time?

    Does Engine Oil Thicken Or Thin Over Time? The oil becomes thinner as it heats up, so it is less dense. If it cools down, it could become thicker. If your engine runs at operating temperature, you need 30 pounds of oil.

    Why is my engine oil so thin?

    Why Is My Engine Oil Thin? Oil that has lost its viscosity and cannot maintain its film strength is thin. Fuel contamination or a lack of a proper Viscosity Index may be the cause.

    What does dark engine oil mean?

    Thick, black, or very dark motor oil usually indicates that your oil has been exposed to dirt or dust contaminants that lead to a soot build-up. Direct injection gasoline engines produce soot over time that causes standard motor oil to turn black and thick.

    Can I use 10W40 in a 4 stroke engine?

    The 10w40 engine oil is a 4-stroke engine oil that lubricates the moving parts of the engine. The oil can be used for generic applications (cars, motorcycles, and other engines) as well as motorcycle-specific applications.


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