G
Guest
·I know this has been discussed
I know this has been discussed on FerrariChat but I wanted tyo get opinion of JRV and the other experst here, as it is all a bit inconclusive over there.
I recently changed to Mobil 1 SHC 75W90 in my Boxer gearbox. I now see talk about this being corrosive to yellow metal synchros. I have emailed Mobil and they say that:
"Well you would need to look in your owner's manual for the specification if it calls for a GL-4 product the Mobil product should not be used on the other hand if the manual recommends a GL-5 then the Mobil SHC product is a good choice."
I can find no reference to either GL-4 or GL-5 in my handbook or in the workshop manual. In fact they each recommend a different oil - Shell Spirax HD90 in the handbook and AGIP in teh workshop manual.
Can soemone tell me which is required and if Mobil 1 SHC 75W90 is OK in my car. I must say that the gear changes feel smoother since I filled with this.
BTW I am pretty certain that my car has the later 512 gearbox fitted from new, should this make a difference.
Simon
I know this has been discussed on FerrariChat but I wanted tyo get opinion of JRV and the other experst here, as it is all a bit inconclusive over there.
I recently changed to Mobil 1 SHC 75W90 in my Boxer gearbox. I now see talk about this being corrosive to yellow metal synchros. I have emailed Mobil and they say that:
"Well you would need to look in your owner's manual for the specification if it calls for a GL-4 product the Mobil product should not be used on the other hand if the manual recommends a GL-5 then the Mobil SHC product is a good choice."
I can find no reference to either GL-4 or GL-5 in my handbook or in the workshop manual. In fact they each recommend a different oil - Shell Spirax HD90 in the handbook and AGIP in teh workshop manual.
Can soemone tell me which is required and if Mobil 1 SHC 75W90 is OK in my car. I must say that the gear changes feel smoother since I filled with this.
BTW I am pretty certain that my car has the later 512 gearbox fitted from new, should this make a difference.
Simon