oil spec for 18 turbo

[chris-18t]

New poster! (less than 10 posts)

hi guys,

Looking to do an oil and filter change, the viscosity i think is in the book as 15/40 but should that be mineral oil? or semi-synthetic? im not sure they doen semi back then?

[Sparkie]

use semi or fully synth- all the gtt guys do.

[Alex]

I've never heard anyone ask this quyuestion about an 18T before I don't know the answer but if it was me I'd be putting something like 10W 40 semi in it. I'm sure that'll work fine.

[Bigfoot]

The catalogue does say to use Mineral 15-40, but as said I am sure semi synth will be fine for it.

[DaveL485]

New poster! (less than 10 posts)

hi guys,

Looking to do an oil and filter change, the viscosity i think is in the book as 15/40 but should that be mineral oil? or semi-synthetic? im not sure they doen semi back then?

I would use 5w50 fully synth.

See discussion here

https://www.rtoc.org/boards/showthread.php?p=350502