06/02/2024
Dear Range Rover Enthusiasts,
We hope this message finds you well. At Range Rover World, we are committed to ensuring the peak performance and longevity of your beloved vehicles. Today, we bring to your attention a critical issue affecting all Range Rovers, particularly those with Diesel Particulate Filters (DPFs).
The Core Problem: Oil Dilution in Range Rovers
Our research, in collaboration with the Oil Lab, has uncovered a significant challenge in Range Rover models, particularly those equipped with the SDV6 and SDV8 engines. The root of the issue lies in the DPF regeneration process, where additional fuel is injected during the exhaust stroke. This method, while necessary for the DPF's functionality, inadvertently allows fuel to seep past the piston rings, contaminating the engine's oil.
Startling Discovery: Viscosity Deterioration
Our intensive testing revealed alarming results. A standard SDV6 oil sample, expected to maintain a 5W30 Synthetic oil grade, degraded to a 5W15 grade after just 4,000 miles of usage. This drastic drop in viscosity compromises the oil's protective and lubricating properties, endangering the engine's internal components.
The Experiment: Seeking Solutions
In our pursuit of a remedy, we conducted an intriguing experiment. After switching the oil in SDV6 and SDV8 models to a 5W40 grade and repeating the 4,000-mile test, the oil's degradation was noticeably reduced, maintaining a 5W30 spec even after an extended 8,000-mile run. Replicating this test across multiple vehicles consistently yielded similar results.
Our Conclusion: A Vital Recommendation
The findings are clear: both the SDV6 and SDV8 engines suffer from severe oil dilution. Our forensic analysis strongly recommends transitioning to a 5W40 C1 Edge or equivalent oil for maximum engine life preservation. Additionally, this oil grade showed a significant reduction in metal particles compared to the 5W30 oil when diluted, indicating better engine protection and reduced metal-on-metal contact.
Immediate Action for Range Rover Owners
Given the prevalence of engine failures in the Land Rover community due to oil dilution, we urge owners, especially those using the standard 5W30 oil, to consider more frequent oil changes – every 6,000 miles. Alternatively, removing the DPF could provide a more permanent solution to this issue. We understand the importance of your Range Rover's performance and reliability. As such, we are dedicated to keeping you informed and providing solutions to enhance your driving experience. To continue reading and for more details on our findings and recommendations click below.
