Hey Guys,

I just got an 1/8 MTA4 truck from a friend and it's got 2 shocks on each wheel but the thing is that 2 wheels have very fast rebound, one is moderate and the 4th wheel has slow rebound.

They have spacers to tune the hardness of the spring but they are all spaced equally.

They have a cap to fill oil but which oil do I need?
Will oil change the rebound? do I just need to top all of the with oil and they will perform equaly?