What's the difference between 15W-40 and 10W 30?

Because 10W-30 is thinner than 15W-40 oil, its film strength can be weaker and it can be more prone to oxidation. Therefore, high quality additives are needed to compensate for those weaknesses in order for a 10W-30 engine oil to protect as well and last as long as a 15W-40.

Can I mix 15W 40 with 10W 30?

You can mix them with no problem. Read on the internet where a guy blow up his car doing that. you can mix the two without a problem, for Wisconsin, the 15w 40 would be a better oil in the summer and 10w 30 would be a better oil for the winter, if you drive the car in the winter!

Can I use 15w40 instead of 10W30 in diesel engines?

Lower viscosity is easier to pump and to shear. This is why many heavy-duty oils are moving from the traditional 15W-40 to 10W-30. If the engine is designed and manufactured to use a 10W-30, it can improve fuel economy and power over using a 15W-40.

Is 15W 40 thicker than 10W 30?

While the viscosity of a heavy duty engine oil accounts for its contribution to fuel economy, it is the composition of the base oil and additives that protect your engine from wear, soot and acid. Since 10W-30 is thinner than 15W-40, its film strength can be weaker and it can be more prone to oxidation.

Is 10W 40 better than 15w40?

A 10w40 oil will be thicker in the cold than 15w40 oil, but they will have the same viscosities at higher temperatures. So during the cold season 15w40 being the lighter weight engine may provide better fuel efficiency provided that the engine can sustain thinner and lighter oil.

On-Highway 10W-30 vs. 15W-40

What is 15W-40 oil used for?

ADVANTAGE 15W-40 HEAVY DUTY DIESEL ENGINE OIL can be used with complete success in over-the-road diesel trucks, off-highway diesel equipment, farm tractors, and passenger cars and light trucks with diesel, turbo-charged diesel engines, or gasoline engines and is backward compatible with previous API Oil Categories.

Is 15W-40 good?

Lighter oils help extend longevity of engine parts. While 15W40 remains a solid choice for running in most temperatures and provides superior protection against engine wear, lighter viscosities offer other benefits.

Can I use 15W50 instead of 10W30?

15w50 oil is an oil that is used under extreme conditions. It depends on the climb in the region you drive through. In a rather cold region I'd use the 10W30. In a warmer or even milder one, I'd use the 15W50.

Which engine oil viscosity is best?

The smaller the number, the better it will flow. A 5W-30 will flow easier than a 10W-30 at start-up temperatures and a 10W-30 will flow more easily than a 10W-40 at normal engine operating temperatures. Engine oil viscosity is important. Engine oils naturally thicken as they cool and thin as they are heated.

Can you use 15W-40 as hydraulic oil?

Mobil Agri Super™ 15W-40 is a high performance, multi-functional lubricant for most farm equipment applications. This STOU lubricant provides good performance in diesel and gasoline engines, transmissions, hydraulics, final drives and oil-immersed brakes operating in agricultural service.

Can you use 15W-40 oil in a gas engine?

Mobil Gas Engine Oil 15W-40 is a premium fleet engine oil specifically formulated to provide reliable protection for trucks and buses using Compressed Natural Gas (CNG) or Liquefied Natural Gas (LNG). Mobil Gas Engine Oil 15W-40 is formulated from high quality base stocks and a balanced additive system.

Why do diesels use thicker oil?

Higher the viscosity thicker the oil. It is believed that thick oils are better at maintaining film strength and oil pressure at high temperatures and loads. This oil is majorly made for the rare cars which are with diesel engines that burns oil excessively. It is a premium high performance mineral.

Is 15W-40 oil thicker than 30 weight?

Next, while hot, 15w40 will be thicker or have a higher viscosity than SAE 30. This is shown by the rating of 40 versus 30 between the two oils. When the engine is warmed up, SAE 30 will flow more easily than 15w40 would.

Is 15W40 oil synthetic?

Mobil Delvac™ Extreme 15W-40 is a synthetic, high-performance diesel engine oil that helps extend engine life while providing long drain capability for modern diesel engines operating in extreme conditions.

Can I use diesel oil in my lawn mower?

So the answer is; nope, diesel oil will not hurt your lawn mower engine.

What is the difference between 10W30 and 10W40 oil?

10W40 oil has a higher viscosity, retaining more thickness than 10W30 as the temperature rises. In that case, 10W-40 motor oil would technically provide better protection against engine wear contact in higher temperatures.

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.

Will thinner oils damage your engine?

Just like using an oil with too high a viscosity may lead to problems in Brad's engine, using a thinner oil can have the same result. Oil that's too thin can fail to develop a consistent lubricating film, inviting metal-to-metal contact that causes wear. Extreme stress and heat add to the challenge.

Is thicker engine oil better?

Within reason, thicker oil maintains a better lubricant film between moving parts. Some have even used thicker oil in a leaky engine to prevent oil from seeping out. But really, thicker oil is not good for your engine.

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.

Does engine oil get thicker or thinner with age?

As the oil oxidises, there are two parallel problems arising. Firstly, as a result of the oil molecules reacting and joining together, the oil becomes thicker and darker. The heavier the molecules become, the heavier, or thicker, the oil gets to be.

Is 15w40 good for hot weather?

In tropical weather, most OEMs still recommend multi-grade products, such as SAE 15W-40, because the lubricant flows faster through the engine than a pure SAE 40 even at higher ambient temperatures.

What is the best oil for 15W-40?

Best Overall

An entirely synthetic motor oil, the Royal Purple 15W-40 Oil formula is made primarily out of high-grade base lubricants. The chemical makeup of this motor oil is strengthened through these additives, facilitating added efficiency.

What is best oil for high mileage cars?