Witch transmission / differential oil should be used for both winter / summer?
According to owner’s manual for my MY2000 Turbo, 75-90 viscosity is from –30 to 40+ Celsius degrees (I would prefer smoother gear changes all the year) and capacities are as follows:
4,00 liters for front transmission/differential
0,8 liters for rear differential.
I know it is covered before and read in previous topics that Castrol Syntrax 75-90 is a good choice, but I would have some opinions about different brands.
Updates please!

JIM

 

i use castrol syntrax in the gearbox and redline 75W90 synthetic gear oil for the rear diff, good for limited slip and conventional diffs.

 

Thanks mate.
More updates please!

JIM

 

Stay with Syntrax in the gearbox. I tried full synthetic but it allowed crunching at higher speeds between 4th and 5th Changed to Syntrax and all was well!
JohnD