Gearbox oil 85w-140 ok to use?
Posted: Thu Jun 22, 2017 4:47 pm
Na8 - service manual says to use SAE 90 for manual transmission. But I already have some 85w -140. Would it be ok to use instead? Thanks
NA8 Owner's Manual from Mazda says to use 75W-90 right across the temperature range, or 80W-90 for above 10 degrees celsius only.
Here's the NA6 Owner's Manual, which is the same for GB oil:
http://www.five-speed.dk/Download/NAOwnersManual.pdf
