What do you have the most difficulty with when it comes to oil or fluid?

[allanuber]

need an option 4

Knowing for sure that the fluid change has been done. Unfortunately a line item on a bill is not a good indicator that anyone has actually changed the fluid.
And if they do, knowing that they changed it with the fancy stuff they charged you for rather than whatever was on special at K mart.

^ This


Doubly true I've found in past for brake fluid.