4 x 5 L can 33421

Atlantic 4T 25W-40 is a 4-stroke motor oil for outboard and inboard engines. Atlantic 4T 25W-40 is based on premium base oils, supplemented with special additives, which achieve the following properties:

  • Lubrication of all engine parts
  • Very powerful detergency, which ensures the engine is cleaner
  • Good cold start properties
  • Very high resistance to corrosion, oxidation and wear
  • Outstanding shear stability


Atlantic 4T 25W-40 is particularly suitable for use in high-speed, heavy-duty outboard and inboard motors. Because 4-stroke outboard motors place different requirements on motor oil, this oil is not suitable for use in cars. This oil complies with the latest requirements for outboard motors, as set out by the American National Marine Manufacturers Association, abbreviated to NMMA.

Product specifications


Typical standard analyses

Density at 15 °C, kg/l 0,878
Viscosity -10 °C, mPa.s 6200
Viscosity 40 °C, mm²/s 140,00
Viscosity 100 °C, mm²/s 14,90
Viscosity Index 107
Flash Point COC, °C 242
Pour Point, °C -27
Total Base Number, mgKOH/g 7,4
HTHS, mPa.s 4,20
Noack, % 5,3