Liqui Moly Leichtlauf High Tech SAE 5W-40 - Durable All-Season Motor

In this review of Liqui Moly Leichtlauf High Tech SAE 5W-40 the bottom line is clear: this fully synthetic motor oil is aimed at drivers who need reliable protection across a wide temperature range, especially owners of modern gasoline and diesel engines without DPFs. The single biggest reason to buy is its combination of fast cold-flow lubrication and high shear stability, which reduces engine wear and can extend oil change intervals up to the manufacturer-recommended limits. For motorists seeking smoother engine operation, lower fuel consumption and proven OEM approvals, this oil delivers consistent, measurable benefits.

Key Features

• Rapid cold start delivery: The 5W viscosity ensures fast oil flow at low temperatures so moving parts receive protection immediately on start-up.
• High temperature reliability: Synthesis technology and robust additives keep lubrication stable under heat and heavy load, protecting turbochargers and multi-valve engines.
• Wear protection: A high level of anti-wear components extends engine life by reducing metal-to-metal contact in critical areas.
• Compatibility: Mixable with commercially available engine oils and formulated to work with a range of OEM specifications for easy service integration.
• Cleaner engine operation: The additive suite promotes outstanding engine cleanliness and has been tested with catalytic converters.
• Fuel economy and emissions: Low-friction formulation helps reduce fuel consumption and pollutant output while maintaining optimum oil pressure at all speeds.

Who It's For

This oil is best for owners of modern gasoline and diesel cars without diesel particulate filters who want a fully synthetic, low-friction oil that supports long drain intervals and demanding driving conditions. It suits vehicles with turbochargers, multi-valve heads and charge air cooling, and is especially appropriate for BMW, VW, Mercedes, Porsche and Renault models where the listed approvals are required.

Those who need oils specifically for engines with DPF systems, or who must follow a manufacturer-mandated oil outside the listed approvals, should check their owner's manual or choose a product formulated for particulate filter compatibility. Track-focused users who change oil frequently for motorsport use may also prefer a different specification tailored to extreme-duty intervals.

Pros & Cons

Pros

• High-quality synthetic base and additives yield smooth engine running and reduced lifter noise reported by users.
• Multiple OEM approvals (BMW Longlife-01, MB-Approval 229.5, Porsche A40, Renault RN 0700/0710, VW 502 00/505 00) give confidence for many European cars.
• Good fuel efficiency benefits and potential for extended oil change intervals when following manufacturer guidance.
• Outstanding engine cleanliness and compatibility with catalytic converters and turbochargers.

Cons

• Not formulated for diesel particulate filter systems, so it is unsuitable where DPF approval is mandatory.
• Cost per litre can be higher than standard mineral oils, though value is often justified by longevity and performance.

Specifications

Product name	Leichtlauf High Tech SAE 5W-40
Volume	5 L
Type	Fully synthetic, synthesis technology
Suitable for	Gasoline and diesel engines without DPF
OEM approvals	BMW Longlife-01; MB-Approval 229.5; Porsche A40; Renault RN 0700/0710; VW 502 00/505 00
Key benefits	Fast cold lubrication, high shear stability, engine cleanliness, fuel savings

Our Verdict

Liqui Moly Leichtlauf High Tech 5W-40 is a strong choice for drivers of modern European gasoline and diesel cars who need dependable all-season protection and the possibility of longer service intervals. The combination of fast cold-flow behavior, OEM approvals and engine-cleaning additives makes it good value for those who prioritize longevity and smoother engine operation.

Frequently Asked Questions

Is this oil compatible with my BMW or VW?
Yes, the oil carries approvals such as BMW Longlife-01 and VW 502 00/505 00, making it suitable where those specifications are required.

Can I use this oil in diesel cars with particulate filters?
No, this formulation is specified for engines without diesel particulate filters; choose a DPF-compatible oil if your vehicle requires it.

How often can I change the oil when using this product?
Depending on manufacturer instructions and driving conditions, oil change intervals can be extended up to the limits recommended by the vehicle maker, with some reports of long intervals when checked properly.