hi everyone, long time lurker here first time poster!
i have an e39 m5 (1999 with the old version piston rings) which burns oil at a rate of 1L / 700km (435mi). i ran a compression test and the results are essentially minimum on one side obo 11.5 bar and the other bank is under 9bar down to even 8bar.
since new it has consumed castrol 10w60 (tws) and i recently switched to liqui moly gt1 10w60 in hopes of lowering the consumption a little bit to no avail.
to be clear i know the engine work that awaits and the $$$ involved but while i save up im trying to at least make the car usable in the mean time.
i noticed some people using motul 6100 15w50 and reporting much lower oil usage. im thinking of trying it for a bit before i essentially rebuild the engine but am a bit concerned since its a synthetic blend.
long story short, what do you guys think about risks of using this oil in the m5? doesnt seem too risky to me but i feel this is the perfect place to get informed opinions.
6100 spec sheet:
PROPERTIES
Viscosity grade SAE J 300 15W-50
Density at 20°C (68°F) ASTM D1298 0.876
Viscosity at 40°C (104°F) ASTM D445 143.4 mm²/s
Viscosity at 100°C (212°F) ASTM D445 19.6 mm²/s
Viscosity Index ASTM D2270 157
Pour point ASTM D97 -33°C / -27.4°F
Flash point ASTM D92 224°C / 435.2°F
TBN ASTM D2896 7.9 mg KOH/g
liqui moly gt1 10w60 specs:
Technical data
Viscosity at 40 °C 155 mm²/s
ASTM D 7042-04
Viscosity at 100 °C 23,8 mm²/s
ASTM D 7042-04
Viscosity at -25 °C DIN 51377
Viscosity index 185
DIN ISO 2909
Color number (ASTM) 3,5
DIN ISO 2049
Density at 15 °C 0,855 g/cm³
DIN 51757
Flash point 240 °C
DIN ISO 2592
Pour point -30 °C
DIN ISO 3016
Evaporation loss (Noack) 6,5 %
ASTM D 5800-08 Method
B
Total base number 8,0 mg KOH/g
DIN ISO 3771
Sulfate ash 1,2 g/100g
DIN 51575
SAE class (engine oils) 10W-60
SAE J300
i have an e39 m5 (1999 with the old version piston rings) which burns oil at a rate of 1L / 700km (435mi). i ran a compression test and the results are essentially minimum on one side obo 11.5 bar and the other bank is under 9bar down to even 8bar.
since new it has consumed castrol 10w60 (tws) and i recently switched to liqui moly gt1 10w60 in hopes of lowering the consumption a little bit to no avail.
to be clear i know the engine work that awaits and the $$$ involved but while i save up im trying to at least make the car usable in the mean time.
i noticed some people using motul 6100 15w50 and reporting much lower oil usage. im thinking of trying it for a bit before i essentially rebuild the engine but am a bit concerned since its a synthetic blend.
long story short, what do you guys think about risks of using this oil in the m5? doesnt seem too risky to me but i feel this is the perfect place to get informed opinions.
6100 spec sheet:
PROPERTIES
Viscosity grade SAE J 300 15W-50
Density at 20°C (68°F) ASTM D1298 0.876
Viscosity at 40°C (104°F) ASTM D445 143.4 mm²/s
Viscosity at 100°C (212°F) ASTM D445 19.6 mm²/s
Viscosity Index ASTM D2270 157
Pour point ASTM D97 -33°C / -27.4°F
Flash point ASTM D92 224°C / 435.2°F
TBN ASTM D2896 7.9 mg KOH/g
liqui moly gt1 10w60 specs:
Technical data
Viscosity at 40 °C 155 mm²/s
ASTM D 7042-04
Viscosity at 100 °C 23,8 mm²/s
ASTM D 7042-04
Viscosity at -25 °C DIN 51377
Viscosity index 185
DIN ISO 2909
Color number (ASTM) 3,5
DIN ISO 2049
Density at 15 °C 0,855 g/cm³
DIN 51757
Flash point 240 °C
DIN ISO 2592
Pour point -30 °C
DIN ISO 3016
Evaporation loss (Noack) 6,5 %
ASTM D 5800-08 Method
B
Total base number 8,0 mg KOH/g
DIN ISO 3771
Sulfate ash 1,2 g/100g
DIN 51575
SAE class (engine oils) 10W-60
SAE J300