I agree with the overuse of the STP... Crazy! I remember adding a 1/2 of a can to my Torino in HS about twice a year. Talk about Pennzoil gum-up with a added WAY too thickness on top of it. Nobody realized back then when you started the car cold and heard the mains knocking 3 or 4 times, that you should use THINNER oil to get into small clearance areas and lube them. NOT thicker. I was guilty of it too. D
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