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Gear oils · API GL-4/GL-5

Gear oil parameters 80W-90

Lab values from technical data sheets in one place. Click a column header to sort, tick up to four oils to compare, even across classes.

Data compiled from manufacturers' technical data sheets, 10 Nov 2026

11oils in class
13.5–18.5viscosity 100 °C, mm²/s
Showing 11 of 11
Repsol Navigator GL-4 80W-90RepsolAPI GL-4Data sheet ↗
153
14
99
−33
230
0.891
Castrol Transmax Axle 80W-90CastrolAPI GL-5Data sheet ↗
130
14
105
−36
220
0.896
77 Lubricants Autogear Oil EP 80W-9077 LubricantsAPI GL-4Data sheet ↗
142
14.3
98
−30
201i
0.891
Q8 T 50 80W-90Q8API GL-5Data sheet ↗
138.5
14.1
100
−30
200
0.896
Repsol Navigator GL-5 80W-90RepsolAPI GL-5Data sheet ↗
133
13.8
100
−30
200
0.895
Divinol GL 5 80W-90DivinolAPI GL-5Data sheet ↗
140
14.3
95i
−33
200
0.9
Divinol Getriebeöl ST 80W-90DivinolAPI GL-4GL-5Data sheet ↗
150
16
90i
−32
190i
0.895
Ravenol Getriebeöl EPX 80W-90 GL-5RavenolAPI GL-5Data sheet ↗
130.3
14.3
108
−33
222
0.882i
Shell Spirax S2 A 80W-90ShellAPI GL-5Data sheet ↗
146
14.7
100
−27
175
0.904
Shell Spirax S2 G 80W-90ShellAPI GL-4Data sheet ↗
146
14.7
100
−27
175
0.9
Eurolub Gear LS 80W-90EurolubAPI GL-5Data sheet ↗
150
15.1
99
−28
200i
0.897
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90951001051414.51515.516Viscosity 100 °C (mm²/s)Viscosity indexRepsol Navigator GL-4 80W-90 – Viscosity 100 °C: 14, Viscosity index: 99Castrol Transmax Axle 80W-90 – Viscosity 100 °C: 14, Viscosity index: 10577 Lubricants Autogear Oil EP 80W-90 – Viscosity 100 °C: 14.3, Viscosity index: 98Q8 T 50 80W-90 – Viscosity 100 °C: 14.1, Viscosity index: 100Repsol Navigator GL-5 80W-90 – Viscosity 100 °C: 13.8, Viscosity index: 100Divinol GL 5 80W-90 – Viscosity 100 °C: 14.3, Viscosity index: 95Divinol Getriebeöl ST 80W-90 – Viscosity 100 °C: 16, Viscosity index: 90Ravenol Getriebeöl EPX 80W-90 GL-5 – Viscosity 100 °C: 14.3, Viscosity index: 108Shell Spirax S2 A 80W-90 – Viscosity 100 °C: 14.7, Viscosity index: 100Shell Spirax S2 G 80W-90 – Viscosity 100 °C: 14.7, Viscosity index: 100Eurolub Gear LS 80W-90 – Viscosity 100 °C: 15.1, Viscosity index: 99
Glossary

What the parameters mean

Viscosity at 40 °C and 100 °C
Kinematic viscosity in mm²/s. The 100 °C value sets the summer grade: 30 starts at 9.3, 40 at 12.5 and 50 at 16.3 mm²/s.
Viscosity index
How little the viscosity changes with temperature. A higher index means a more stable oil.
TBN
Total base number in mg KOH/g. A reserve for neutralising acids; higher helps with long drain intervals. C3 oils deliberately have a lower TBN because of the DPF filter.
CCS
Apparent viscosity at cold start in mPa·s. The limit is 6200 at −35 °C for 0W, 6600 at −30 °C for 5W and 7000 at −25 °C for 10W. Lower means easier starting.
Pour point
The lowest temperature at which the oil still flows. Lower is better.
Flash point (COC)
The temperature at which vapours ignite, measured in an open cup. Higher usually means lower volatility.
Density
In g/cm³, usually given by manufacturers at 15 °C. Used for checking, not for rating.
HTHS
Viscosity at 150 °C and high shear in mPa·s. Shows bearing protection under load. ACEA A3/B4 and C3 require at least 3.5.
Sulphated ash
Ash content in % by weight. For engines with a DPF filter a low number matters; C3 allows at most 0.8 %.
Noack volatility
How many percent of the oil evaporates per hour at 250 °C. Lower means less oil consumption.
Did you know

The same oil, another name

These oils have identical laboratory values. Most likely it is the same oil sold under several names.

  • We found no oils with identical values in this class.