FOSSER Premium RSL 5W-50


1 litre, 4 litre, 5 litre, 20 litre, 60 litre, 208 litre


FOSSER Premium RSL is a synthetic high-performance engine oil of SAE class 5W-50. Synthetic components combined with carefully selected innovative additives guarantee that the product meets the latest market requirements. Thanks to the significantly improved engine oil quality of FOSSER Premium RSL, it offers further enhanced wear protection and keeps the engine perfectly clean, even at extended oil change intervals. The extremely low cold viscosity of the lubricant and its reliable high-temperature viscosity properties guarantee significant reductions in fuel consumption.

FOSSER Premium RSL is the ideal high-performance low-friction engine oil for demanding engines. It is used in petrol and diesel engines in passenger cars, including models with turbocharger and direct injection. The product is recommended for all operating conditions.


  • ACEA A3/B4 • API SN/CF


  • VW standards 502.00 / 505.00
  • MB 229.3
  • BMW Longlife – 98
  • Porsche A 40

* meets the requirements of the OEM manufacturer

SAE class DIN 51 511 - 5W-50
Density at 15°C DIN 51 757 g/cm3 0.860
Viscosity at -30°C DIN 51 377 mPa s 6200
Viscosity at 40°C DIN 51 562 mm2/s 120
Viscosity at 100°C DIN 51 562 mm2/s 19
Viscosity index (VI) DIN ISO 2909 - 180
COC flash point DIN ISO 2592 °C 220
Pour point DIN ISO 3016 °C -36
Total base number DIN ISO 3771 mgKOH/g 10
Sulphated ash DIN 51575 g/100g 1.1
The above values may vary within commercially accepted tolerances

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