Originally posted by JonnySVT:
Quote:

You should not have to change either the plugs or the oil. If you are changing the oil and or the plugs anyway because they are due, change after the treatment.


I just do it right before my scheduled oil change, just as an added preventitive measure. I thought that's what you recommended before Jim?



This is my preference. I usually do it at the same time as an oil change. At work, these services are done irrespective of each other and it doesn't seem to hurt anything.

Jim Johnson 98 SVT 03 Escape Limited