Hi all,
i've passed last two days reading on about gear oils, but I still need your precious suggestions.
My local dealer (in italy) can only provide Castrol Syntetic oil (GL4), non suitable for my transmission or Motul 80W90 GL5 Dino based. (No Swepco, No Kendall NS-MP, no RedLine).
Here are the two Motul products
Motul HD 80W90 -> Mineral Oil, API GL-4/GL-5 ---->
product page
Motul Gearbox 80W90 -> Mineral Oil, API GL-4/GL-5, Moly reinforced ---->
product page
Price difference is negligible (about 2$ more for the Moly reinforced) and looking at Motul site both seems to be suitable for my transmission.
My transmission is a 915 stock transmission from 1973 never rebuilt and it has 85000Km. I think it’s in good shape because it don’t grind, isn’t noisy (just a little bit), but sometimes, especially when hot, it’s hard to shift from 1st to 2nd (upshift) and from 5th to 4th (downshift).
Can you please tell wich oil should I prefer ...aka ... to moly or not to moly ??? ;-)
I ask because I learned i have to avoid syntetic oils in 915s but is there any contraindication with Moly additives??