FOSSER Premium RSL 5W-50: Performance at the Highest Level
| Sport


🏁 Proven Performance for True Challenges
When it comes to top performance on the racetrack, there is no room for compromise. FOSSER Premium RSL 5W-50 is more than just motor oil – it’s the key to maximum performance, even under the most extreme conditions. Our synthetic high-performance, low-friction motor oil not only impresses with its innovative technology but also delivers outstanding results.
Track-Tested: 6 Hours of Endurance at Serres
During one of the most demanding tests, the 6-hour endurance race at the Serres Race Track, the “HPP Garage” trusted FOSSER Premium RSL 5W-50 – and the results speak for themselves. Even under continuous high-stress conditions, our oil showcased its exceptional qualities:
- Enhanced wear protection to safeguard the engine, even under intensive use.
- Improved engine cleanliness, ensuring reliability even with extended oil change intervals.
- Consistent performance at high temperatures, a critical factor in motorsport.
“The oil performed magnificently under extreme conditions. Thanks for the recommendation!” – This was the feedback from our partner after the race.
Hill Climb Racing: Power and Precision in Croatia
Not only in Serres but also during Hill Climb Racing in Croatia, FOSSER Premium RSL 5W-50 proved why it’s the top choice for demanding drivers. Our partner, @fosser_bulgaria, and the “HPP Garage” relied on our oil, achieving impressive results even in this high-intensity discipline.
Thanks to its extremely low cold viscosity and secure high-temperature viscosity, FOSSER Premium RSL 5W-50 ensures optimized lubrication and fuel efficiency – both on the track and in everyday driving.

Why Choose FOSSER Premium RSL 5W-50?
Our synthetic high-performance oil sets new standards in engine technology. Here are its key features:
- SAE Grade 5W-50: Perfectly suited for passenger car gasoline and diesel engines, including turbo versions and direct-injection engines.
- Maximum engine cleanliness: Innovative additives keep your engine clean and durable.
- Outstanding wear protection: Extends engine life, even under the toughest conditions.
- Fuel-saving: Optimized viscosity reduces fuel consumption.
From Racetrack to Daily Use – Reliability in Every Situation
Whether on the road or the racetrack, FOSSER Premium RSL 5W-50 is ready for any challenge. With specifications like ACEA A3/B4 and API SN/CF, and manufacturer recommendations from VW, Mercedes-Benz, BMW, Porsche, and Renault, it meets the highest standards.
Stay Tuned!
Our partners, such as @fosser_bulgaria, continue to show what’s possible with the right support. Whether it’s endurance racing, hill climbs, or everyday use – FOSSER Premium RSL 5W-50 is your reliable companion.
We’re looking forward to many more thrilling moments on and off the racetrack. With FOSSER, you’re always one engine length ahead! 🏎️💨