Rear Suspension Grease?

[baotian]

Hi
all, i might sound a bit of a newb
but does the rear shock suspension need greasing, because that may be the cause of my squeaks, or is there a sort of bike grease i can buy for it that would help, that wouldn't damage anything

Thanks in advanced

[chcknugget]

I put used motor oil on my front and rear shocks and it lubes it up for only a week but keeps the squeaks away!