Rather than chasing through threads and the files section of REMLR, the attached pics are handy extracts from EMEI Vehicle G 109 - Perentie 4x4 servicing requirements. Note that for a while now the ADF has been specifying 15W40 oil in lieu of SAE40 / OMD 115 - all of which are 40 weight oils.
Here's my consolidated list of 4x4 GS without winch servicing info. Please double check before Purchase.
(There are other good oils of the same specs - shop around)
Engine oil: castrol rx super 15W40 (6.5 Ltr - check level on dipstick as you are filling)
Gearbox: castrol rx super 15W40 (2.7 Ltr)
Transfer: castrol rx super 15W40 (3.2 Ltr) (without winch)
Diffs:F&R: Castrol EPX-80W90 (1.7, 2.3 Ltr)
Steering Box: Castrol EPX-80W90 (.45 Ltr)
Swivelhousings: Molytex Greas
Steering Relay: Castrol EPX-80W90
Oil filter:
LR - AYG 585
ISUZU - 8-94321219-1
BALDWIN - B7144
DONALDSON - P550422
FLEETGUARD - LF3642
Fuel filter:
ISUZU - 8971725491
BALDWIN - BF954
DONALDSON - P550057: P550588 (Fuel/Water Separation Filter)
FLEETGUARD - FF5030
Fuel filters. Fill the main filter with diesel before you replace it - easier to bleed. The banjo bolt and reusable filter is almost inside the drivers side engine mount - 17mm short flat spanner. Bleed system after reinserting banjo and replacing main fuel filter.
Air filter:
DONALDSON - P900433 (Air, Main): P900434 (Air, Inner)
FLEETGUARD - AF4059K (Air, Main): AF988 (Air, Inner)
BALDWIN - PA2418 (Air, Main): PA2332 (Air, Inner)