Any standard SAE 30 or 10W 30 through 50 works.
On rare occasions I have used 90W gear oil to extend the life of very bad bushings (personal cars only).

Remove the squirrel cages to fully access your bushings, it takes time for the thicker oil to penetrate as you are lubing the bushings, (roughly five to seven minutes of exercise to work in).



Have a great day

__________________
ASE Master Mechanic

Prototype R&D/testing:
Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
HV-A/C Climate Control.
Vehicle build.
Fleet Durability
Technical Quality Auditor.
Automotive Technical Writer

1985 300SD
1983 300D

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