What's the difference between 5w 40 and 15W-40?

What is this? 5w40 and 15w40 are two different types of engine oil that seem and sound similar. 15w40 is perfect to use in an environment where the temperature range from -20 Celsius to 40 Celsius. Whereas, 5w40 is used in temperatures ranging from -30 to 40 Celsius.

Is it OK to use 5w40 instead of 15w40?

YES. Lowering the first number gives you much faster oil circulation on every startup, and especially in the cold. So you engine will have lower wear on every start-up. And since it flattens the viscosity curve, in hotter areas, like turbos, a 5W-40 will have more viscosity than a 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.

What temperature is 15w40 good for?

The number "40" describes the flowability of the engine oil at an operating temperature of 100 °C. The kinematic viscosity of a 15W40 oil at 100 °C is in the range of 12.5 - 16.2 mm²/s. Engine oils with SAE Class 15W40 function in the temperature range from -25 °C to +40 °C.

What is the difference between 5W and 15W?

A 5W viscosity grade requires the lubricant to flow properly at lower temperatures than, for example, a 15W viscosity grade, so it is expected to be used at lower starting temperatures.

5w-40 vs 15w-40

What does 15W-40 stand for?

What does 15W-40 mean? 15W-40 viscosity grade means it flows like a 15 weight oil from start up in Winter, but provides the protection of a 40 weight once the engine reaches full operating temperature.

Which is better 5W30 or 15w40?

Probably not. 15w40 is usually used in diesel engines and has a much different additives profile. 5w30 is usually used in gasoline engines. Diesel oil is designed with high antiwear additives such a ZDDP.

Can I run 15W40 in the winter?

If you have an APU that's designed to heat the engine block, 15W40 oil will be sufficient year-round. If your APU doesn't have that feature, he recommends using 5W-40 for better cold starts.

What temperature is 5w40 good for?

In practice, this means that each oil is just as viscous at lower temperatures and will remain viscous at -30°C, however 5w40 oil outperforms 5w30 oils at higher temperatures, being effective up to ambient temperatures of 50°C, as opposed to 30°C.

Which engine oil is best for hot weather?

A climate that experiences warmer temperatures all year long may necessitate a heavier engine oil such as an SAE XW-30 or XW-40 grade - one able to resist the breakdown that comes with higher operating temperatures by ensuring proper and adequate film thickness and the protection of critical engine components.

What cars can you use 15W40 oil for?

Semi Synthetic 15W-40 is suitable for use in passenger cars, 4WDs & light commercial vehicles and is compatible with Petrol/LPG (Dual Fuel), E10, Diesel (without DPF) and most other conventional fuels. If using with E85 fuel, Penrite recommend more frequent oil change periods.

Is 15W40 good for gas engines?

Yes it can but usually for petrol or gasoline engine, the usual oil is 20W50, somewhat higher viscosity grade since gasoline engines have higher operating temperatures, thus need a higher viscosity or thick oil.

What cars take 15W-40 engine oil?

Will 5w40 increase oil pressure?

However, as it warms up, the 40 oil will get thicker and more viscous relative to the 30. This will, increase oil pressure and the work that oil pump has to do.

What is the best oil to use in a diesel truck?

Shell's diesel motor oil is a great choice for both new and older diesel engines as it exceeds API CJ-4 requirements. Shell's motor oil provides fantastic performance and has enhanced viscosity control.

Can you put 5w40 in a diesel engine?

Mobil 1 Turbo Diesel Truck 5W-40 engine oil is recommended for use in all super-high-performance diesel applications, including modern low-emission engine designs with Exhaust Gas Recirculation (EGR). These applications include: On-highway engines operating in both high-speed/high-load and stop-and-go conditions.

Can you use 5W40 in the summer?

Can You Run 5w 40 In The Summer? The new 5W40 is great for summer, with its great cold start specs and great performance. The soot load and dilution of fuel will determine how long you can go without interruption.

How long does 5W40 synthetic oil last?

Unlike regular car oil, synthetic oil is more refined which can lower friction, reduce engine sludge, and increase engine performance. It's recommended that you change synthetic oil every 7,500 – 15,000 miles, depending on the vehicle and the brand of synthetic oil used.

Is 5W40 better for high mileage cars?

5w40 is often used in higher mileage engine sand performs better in warmer temperatures.

How cold is too cold for a diesel engine?

How cold is too cold for a diesel truck? The diesel fuel in your fuel tank will become like gel at a temperature of 15ºF or -9.5ºC and you will have trouble starting your engine. Anything below 15ºF / -9.5ºC can and will cause problems for your diesel vehicle.

What diesel is best for cold weather?

As temperatures continue to drop, you'll want to replace your No. 2 diesel with a No. 1, which is free of paraffin wax and therefore offers the best operability during the coldest parts of winter.

What diesel fuel is best for winter?

Diesel #1 is also known as winter diesel because it performs better than Diesel #2 in cold temperatures. It has a lower viscosity and is not prone to gel in freezing temperatures. Most stations offer a premium Diesel mix that is blended for local weather conditions. Diesel #2 costs less at the pump.

What will happen to an engine if I put 15W40 in place of 5W30?

Using 15w40 instead of 5w30 will increase your fuel consumption because of more load on your engine's crank. No, you won't blow a head gasket, but 15W40 is too heavy an oil to use where 5W30 is required. Besides, most 15W40 oils are gor diesel engines.

Is Rotella 15W40 good for gas engines?

Shell Rotella® T4 NG Plus 15W-40 provides excellent protection for mixed fleets, meeting a wide range of specifications for Natural Gas Engine Oil, Heavy Duty Diesel Engine Oil and Passenger Car Motor Oil.

What does the W mean in engine oil?

SINGLE-GRADE MOTOR OIL

Single-grade motor oils with the W mark indicate that they are for winter temperature applications. Single-grade motor oils fulfill a single viscosity specification which means that they are designed for application at stable temperatures.