10W40 engine oil

What does 10W-40 mean?

10W-40 is a multi-grade oil designed for engines operating in varying temperatures and under different loads:

• 10W: This indicates the oil's ability to stay fluid at low temperatures, though it is slightly thicker than 5W oils, making it more suited for moderate climates.
• 40: The higher viscosity at operating temperatures means the oil maintains its thickness and provides excellent protection under heat and heavy loads.

What is 10W40 oil used for?

10W-40 is commonly used in older vehicles and those with higher mileage, as its thicker consistency can help reduce oil consumption and provide better sealing for worn engine parts. It’s also a popular choice for motorcycles and high-performance engines requiring extra protection during demanding conditions.

Engine oil 10W40: Specifications

10W40 engine oil: for which cars?

What's the difference between 10W40 and 10W30 or other viscosities?

10W30 vs 10W40

• Cold start: both oils perform similarly in cold weather, but 10W30 flows slightly easier.
• Operating temperature: 10W40 offers better viscosity at higher temperatures, making it more stable in extreme heat.
• Fuel efficiency: 10W30 typically provides better fuel economy due to lower viscosity.
• Protection under load: 10W40 offers stronger protection under heavy loads or high-stress conditions.
• Application: 10W30 is suited for everyday driving, while 10W40 is suitable for modern engines in diverse climates.

SAE 30 vs 10W40

• Cold start: 10W40 performs better in cold conditions, whereas SAE 30 is not recommended for low temperatures.
• Operating temperature: SAE 30 maintains a consistent viscosity at high temperatures, while 10W40 adapts across a wider temperature range.
• Fuel efficiency: 10W40 is generally more efficient in cold starts, but SAE 30 may offer marginally better efficiency in steady, warm conditions.
• Protection under load: 10W40 provides better load protection under variable conditions.
• Application: SAE 30 is commonly used in lawnmowers and older engines, while 10W40 is suitable for modern engines in diverse climates.

10W40 vs 10W50

• Cold start: both oils perform well in cold weather, offering similar startup characteristics.
• Operating temperature: 10W50 provides superior protection at high operating temperatures, particularly in extreme heat.
• Fuel efficiency: 10W40 offers slightly better fuel economy due to its lower high-temperature viscosity.
• Protection under load: 10W50 delivers enhanced protection under extreme loads and high-performance driving.
• Application: 10W40 is suitable for regular use, while 10W50 is ideal for high-performance engines and extreme conditions.

How to buy SAE 10W-40 engine oils

Have you run out of your stock of engine oil? Don’t worry: here you can order SAE 10W-40 motor oil at a reasonable price within a couple of minutes. You will be pleased with our fast delivery.

How much does 10W40 engine oil cost?

The price for 10W40 engine oil is between £3.67 and £9.23 per litre:

• The cheapest 10W40 engine oil costs £3.67 per litre.
• The most expensive 10W40 engine oil costs £9.23 per litre.

Which is the best 10W40 engine oil?

Our most popular brands of 10W40 engine oil are: CASTROL, RIDEX PLUS, MOBIL, MOTUL, SHELL

10W-40 engine oil meets a wide range of specifications including ACEA A2, ACEA A2/B2, ACEA A3/B3, ACEA A3/B4, ACEA B3, as well as OEM recommendations such as ALLISON C4, ALLISON TES-439, Afnor NF E 48-603 HM, Afnor NF E 48-603 HV, BMW Longlife-98.