Original specifications are:-
Engine, aircleaner and governor - SAE20W , diesel rated oil for diesels.
This viscosity is for temperatures up to 32C, so for Australia, you can go a grade heavier, and in summer, particularly with the engine a bit worn even two grades.
Multigrade oils were approved. Any oil you can buy will be superior to the original specified oils! But avoid very light oils.
Gearbox, Transfer case, differentials, swivel pin housings, steering box, steering relay, rear PTO, capstan winch - EP90
Any of the oil companies will have tabulations giving their recommended products for Series Landrovers - they may not go back to yours, but the requirements were the same until the end of Series 3 production in 1984, and they should list them.
Hope this helps,
John
John
JDNSW
1986 110 County 3.9 diesel
1970 2a 109 2.25 petrol
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