Multi-purpose grease

  • Klübersynth GE 4 75 W 90 is a fully synthetic high-performance gear oil based on polyalphaolefin (PAO), which offers high shear stability and protection, even when exposed to impact load. It is particularly suitable for rail vehicle gears subject to high loads.
  • This high-performance gear oil offers a very high scuffing load capacity of API GL-5, and can therefore be used for gears which have to meet API GL-4 or API GL-5 requirements. The good wear protection of both gears and rolling bearings enables a long service life of the lubricated components for reduced maintenance costs. The high micropitting resistance of GFT ≥ 10 acc. to FVA 54/7 offers sufficient protection to gears that are subject to high loads and would normally be susceptible to this type of damage.
  • The good shear stability of the synthetic base oil prevents decrease of the lubricating film thickness even under high loads. Due to the excellent ageing and oxidation stability of the synthetic base oil, oil change intervals are much longer than with mineral oils, thus reducing maintenance costs.
  • The good low-temperature properties enable a reliable function of the gear components, even at low temperatures. Operational reliability of the lubricated components is also enhanced by the
    good anti-foam and anti-corrosion properties.
  • Content: 20kg bucket
  • Available in 20kg bucket, 200kg drum

Benefits for your application

  • Highest scuffing load capacity API GL-5
  • Excellent wear protection of both gears and rolling bearings
  • Good shear stability for reliable lubricating film formation
  • High micropitting resistance
  • Excellent ageing and oxidation resistance
  • Wide service temperature range due to good viscosity-temperature behaviour
  • Good anti-foam properties
  • Particularly suitable for rail vehicle gears - approved by Watteeuw, Voith Turbo, Siemens-Flender, Bombardier, Deutsche Bahn AG, Stadler and many more


  • Klübersynth GE 4 75 W 90 is used for the lubrication of spur, bevel and hypoid gears requiring maximum wear protection and service life, even when exposed to impact loads. Klübersynth GE 4 75 W 90 is suitable for drives in rail vehicles, industrial robots, textile machines and forming presses.

Technical specifications

Lower service temperature  -40 °C / -40 °F
Upper service temperature  150 °C / 302 °F
Density, DIN 51757, 20 °C approx. 0,86 g/cm³
Kinematic viscosity, DIN 51562 pt. 01/ASTM D-445/ASTM D 7042, 40 °C approx. 130 mm²/s
Kinematic viscosity, DIN 51562 pt. 01/ASTM D-445/ASTM D 7042, 100 °C approx. 18 mm²/s
SAE-viscosity grade  75 W 90
Viscosity index, DIN ISO 2909  >= 150
Flash point, DIN EN ISO 2592, Cleveland, open-cup apparatus  >= 210 °C
Anticorrosive properties on steel, DIN ISO 7120, method A, steel, 24 h/60 °C no rust corrosion degree
Four-ball EP tester, welding load, DIN 51350 part 2 >= 3 000 N
Pour point, DIN ISO 3016 <= -42 °C
API scuffing load capacity  API GL 5
Flender foaming test with original oil, increase in volume  <= 15 %
FZG scuffing test, DIN ISO 14635-1, A/8.3/90, scuffing load stage >= 14
FZG micropitting test, FVA 54, GF-C/8,3/90, failure load stage >= 10
FAG FE8 rolling bearing test, DIN 51819-3, D 7,5/80-80, wear of rolling element <= 30 mg
Minimum shelf life from the date of manufacture - in a dry, frost-free place and in the unopened
original container, approx.
 36 months

Klübersynth GE 4 75W90 Synthetic high-performance gear oil