Originally Posted By: rw19
So we have beat the old mobil 1 vs castrol vs pennzoil to death, I have a new topic for the BITOG crew. Do you change your oil after you do your plugs?
I always do I don't want the crud going into the block and recrulating till the pesky filter gets to it.
Chime in, I have yet to find any topics like this on the internet. I know a lot of us soak our plugs in penetrating fluid to get them out easier, this also drips into the oil. Penetrating fluid is more solvent than a lubricant, and do you guys use never seeze after you install the plugs? I used too, but then again that probably seeps into the oil as well and god knows whats in that!
You are making a mistake to start with. Never use penetrating oil or any other kind of oil on the spark-plug threads.
If you do, you will overtorque them, possibly break them, and will have difficulty removing them next time.
Spark plugs must be installed with cleaned and dried threads -- no oil whatsoever. You need to then torque them using a torque wrench to the specified torque. Never overtorque them, which could break them. You should never need penetrating oil when removing them. If there is a problem, it means that someone overtorqued them -- not good. Again, if you use oil on the threads when you install the spark plugs, you will end up overtorquing them.