Hi guys, hopefully someone can resolve this mystery regarding Manual Transmission Oil for a Gen1 987 because I've been reading different things in online forums.
Does it matter whether you put 75W-90 or 75W-140 in the Manual Transmission of a Gen1 987? My trusted Indie Specialist recently put 75W-140 in my transmission when doing the 12-year fluid change because they said it exceeds Porsche's spec & therefore would be better long term & the higher viscosity would offer better protection when hot but I'm not convinced.
I've looked carefully through the owners manual & other than stating that you should use Porsche's own fluid, there's no mention of a make or viscosity or any other spec.
I therefore spoke to my trusted local OPC parts guy who checked their oil for any info as apparently, it only gets supplied to OPCs in 20 litre containers.
The OPC parts guy confirmed that the only thing written on the barrel was that it was Porsche Hypoid Transmission Oil & nothing else.
Therefore, where is it written that Mobil1 is recommend for the transmission & what the viscosity should be?
Thanks for any help/advice.
Does it matter whether you put 75W-90 or 75W-140 in the Manual Transmission of a Gen1 987? My trusted Indie Specialist recently put 75W-140 in my transmission when doing the 12-year fluid change because they said it exceeds Porsche's spec & therefore would be better long term & the higher viscosity would offer better protection when hot but I'm not convinced.
I've looked carefully through the owners manual & other than stating that you should use Porsche's own fluid, there's no mention of a make or viscosity or any other spec.
I therefore spoke to my trusted local OPC parts guy who checked their oil for any info as apparently, it only gets supplied to OPCs in 20 litre containers.
The OPC parts guy confirmed that the only thing written on the barrel was that it was Porsche Hypoid Transmission Oil & nothing else.
Therefore, where is it written that Mobil1 is recommend for the transmission & what the viscosity should be?
Thanks for any help/advice.