Log in

View Full Version : Mixing differential oil


Defender08
9th February 2014, 12:05 PM
The oil in my front diff looks like it contains molybdenum di sulfide - it is probably Molytex EP 90 as per workshop manual recommendations. Following suggestion in my owners manual, I bought Castrol EPX 80/90W to top up differentials.
Are the two oils compatible?
Sirocco
9th February 2014, 02:57 PM
should be, but I would strongly recommend you drain the lot and replace with new of the same type. When was the diff oil last changed?

G
Defender08
9th February 2014, 03:47 PM
Oil hasn't been changed for at least 18 months.
n plus one
10th February 2014, 03:03 PM
Oil hasn't been changed for at least 18 months.

You kinda' just answered your own question then :D no need to mix if you're draining.