Canon
New member
Hello 
I like reading/study about oils and I have a Nimbus boat with a Volvo penta MS4B gearbox, according to the manual I should use a 75w90 GL5 oil or mobil 1 SHC 75w90 if Volvos oil is not available, the funny thing is when I starting to compare the safety data sheets its obvious that Volvo 75w90 GL 5 and Mobil 1 SHC 75w90 is the same oil in different containers and if I then reads the specs from the Mobil 1 SHC 75w90 it says GL4/GL5 spec, its has GL4 spec but its also recommended for GL5 applications.
Mobil 1 states that the oil has mild EP-additives (guess thats why its still has GL-4 spec). So... Why does volvo states in the manual that i should use a GL-5 oil, when their own oil is more like a GL4/5 hybrid? Is there yellow metals in MS4 gearboxes? Is it really safe to use a pure GL-5 oil? Maybe many of the MS4 breakdowns is related to that people is using pure GL-5 oils? (if there are any yellow metals inside, and I dont know how they usually breakdown, just a tought of mine..)
*Is there yellow metals in MS4 gearboxes?
*I wonder if any of you have used a real "full power" EP GL-5 oil for a long period of time in a MS4 gearbox with good results?
*Has anyone tried a 75w140 oil instead of 75w90 with smoother gear engagement etc?
*How does a MS4 gearbox usually breakdown?
Maybe the real Volvo penta recommendation should be "API GL4/GL5 , MT-1" ? Or well, thats actually what they recommend if they recommend their own 75w90 and M1 SHC 75w90.
Best regards!!
I like reading/study about oils and I have a Nimbus boat with a Volvo penta MS4B gearbox, according to the manual I should use a 75w90 GL5 oil or mobil 1 SHC 75w90 if Volvos oil is not available, the funny thing is when I starting to compare the safety data sheets its obvious that Volvo 75w90 GL 5 and Mobil 1 SHC 75w90 is the same oil in different containers and if I then reads the specs from the Mobil 1 SHC 75w90 it says GL4/GL5 spec, its has GL4 spec but its also recommended for GL5 applications.
Mobil 1 states that the oil has mild EP-additives (guess thats why its still has GL-4 spec). So... Why does volvo states in the manual that i should use a GL-5 oil, when their own oil is more like a GL4/5 hybrid? Is there yellow metals in MS4 gearboxes? Is it really safe to use a pure GL-5 oil? Maybe many of the MS4 breakdowns is related to that people is using pure GL-5 oils? (if there are any yellow metals inside, and I dont know how they usually breakdown, just a tought of mine..)
*Is there yellow metals in MS4 gearboxes?
*I wonder if any of you have used a real "full power" EP GL-5 oil for a long period of time in a MS4 gearbox with good results?
*Has anyone tried a 75w140 oil instead of 75w90 with smoother gear engagement etc?
*How does a MS4 gearbox usually breakdown?
Maybe the real Volvo penta recommendation should be "API GL4/GL5 , MT-1" ? Or well, thats actually what they recommend if they recommend their own 75w90 and M1 SHC 75w90.
Best regards!!
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