I'm getting ready to replace the struts on one of my vehicles using a set of ampro T70570 coil spring compressors:
Before each use inspect, clean and lubricate threads on threaded shaft.
Lubricate threads on spring compressor with engine oil.
Could I use any oil, like WD-40 or a moly grease, or does it really need to be specifically engine oil?
Also, why do the threads need to be lubricated?
My particular tool did not come with any instructions.