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I'm looking to replace most of the fluids in my 122 wagon before I go on an upcoming road trip. I've owned the car for 8 years now and I have no records from the previous owners as to the last change of certain fluids. I do keep the engine oil up to date with oil changes, but I was thinking of my gearbox and rear axle.
My various manulas say...
Castrol GTX, or SAE 30 oil for the gearbox
Castrol Hypoy B (90 EP), or Hypoy LS, or SAE 90 Oil for the rear axle
What do you use in your 122's? Is there something better out there? Has anyone tried Royal Purple?
Any input would be greatly appreciated!
Thanks!
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