Originally Posted by Cab_Burge
Originally Posted by cudaman1969
Nah, why change it, does it go bad? Stick your finger in the hole to check the condition.
shock Are you kidding ME shruggy
It has been hot and cold multiple times and absorb moisture when cooling off (if I'm remembering my high school chemistry correctly oil, liquid petroleum grease and water heated up will make sulfuric acid when it cools down, not pure acid but minute amounts, correct?) and you think it doesn't go bad tsk scope


That’s what the vent is for, now IF you start cooking oil to the flash point by all means change it. But then the oil is the least of the problem. My 65 Plym still has the original rear and trans fluid, still good.