5W-40 Oils
5W-40 motor oils are high-viscosity lubricants, ideal for modern gasoline and diesel engines. Their wide viscosity range (5W at low temperatures and 40 at high temperatures) ensures easy starting in cold weather and optimal lubrication under hot conditions.
These oils offer excellent high-temperature stability and protect the engine from wear. They are suitable for a wide range of vehicles and often meet the most demanding specifications of automakers. Using 5W-40 motor oils can extend engine life and improve overall performance.
What 5W-40 engine oils do we offer?
We offer 5W-40 motor oil from FUCHS, for which we are an official distributor: Titan SUPERSYN, Titan GT1 FLEX 3, and Titan SUPERSYN C3 in 1-, 4-, and 5-liter containers. You can select the correct oil based on the ACEA specification and manufacturer’s approval, which can be found in your vehicle’s owner’s manual or service booklet.
What does the 5W-40 designation mean?
5W-40 is a viscosity grade according to the SAE J300 standard. The number 5 followed by the letter W (winter) describes the oil’s behavior in cold conditions: the oil must pass a cold start test at −30 °C. The number 40 indicates the viscosity at an operating temperature of 100 °C, within the range of 12.5–16.3 mm²/s.
How to Choose 5W-40 Motor Oil for Your Car
The key factors are the specifications and approvals required by the car manufacturer, not just the viscosity. All three oils are rated 5W-40, but they differ in their ACEA standards and automaker approvals:
|
Oil |
ACEA / API |
Manufacturer Approvals (selection) |
For which cars |
Packaging |
|---|---|---|---|---|
|
A3/B4, API SN/SM/CF |
MB 229.3, VW 502 00/505 00, Porsche A40, Renault RN0700/RN0710 |
Vehicles with extended service intervals |
1, 4, 5 L |
|
|
C3, API SN |
BMW Longlife-04, MB 229.31/229.51/229.52, Porsche C40, VW 511 00 |
Modern passenger cars and light commercial vehicles with exhaust aftertreatment systems and turbochargers |
1.5 L |
|
|
C3, API SN |
MB 229.31 |
Gasoline, diesel, LPG, and CNG, including vehicles with exhaust aftertreatment systems |
1.5 L |
According to FUCHS, C3-spec oils are also designed for vehicles with exhaust aftertreatment systems. Always choose an oil with the specification recommended by your vehicle’s manufacturer.
Which 5w40 oil package to choose
The 1-liter package is suitable for topping off between oil changes, while the 4- and 5-liter packages are suitable for an oil change in a passenger car (you can find the exact fill volume in your car’s owner’s manual).
Other engine oils
If your car requires a different viscosity, check out 5W-30 oil, 0W-30 oil, 10W-40 oil or the full range of FUCHS motor oils.
Frequently Asked Questions
What is the difference between 5W-30 and 5W-40 oil?
They behave the same at low temperatures (5W grade); the difference lies in their operating temperature. At 100 °C, 5W-40 oil has a viscosity of 12.5–16.3 mm²/s, while 5W-30 oil has a viscosity of 9.3–12.5 mm²/s, making it thinner. The vehicle manufacturer determines which one to use.
Is 5W-40 oil suitable for both gasoline and diesel engines?
It depends on the specific oil and the car manufacturer’s specifications. For example, FUCHS specifies that Titan SUPERSYN C3 5W-40 can be used in gasoline, diesel, LPG, and CNG engines; in diesel engines, however, it should only be used with low-sulfur diesel.
What do the numbers 5 and 40 in the oil designation mean?
5W is the cold start grade (tested at −30 °C), and 40 is the viscosity at 100 °C. Both numbers are based on the SAE J300 standard.
Can I mix 5W-30 and 5W-40 oil?
FUCHS states that its oils are miscible with common brand-name motor oils, but recommends avoiding mixing to fully utilize their properties. When switching to a different oil, it recommends a complete oil change.
What size container of 5W-40 oil should I buy for an oil change?
For a passenger car oil change, choose a 4- or 5-liter container depending on the fill volume specified in the vehicle’s owner’s manual. For a top-off, 1 liter is sufficient.
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