Well today Quaker State is not your Father's Quaker State to coin a phrase.
Quaker State oil in the old days was something special. I know of a case where a mechanic not only diagnosed a problem with the hood closed but recommended the fix for free. His exact words were "Get that G$%#%#%n Quaker State Oil out of that engine." Once the Quaker State was replaced with Havoline the problem (ticking lifters) disappeared. I don't know why the lifters were ticking and I don't know how the mechanic knew there was Quaker State oil in the crankcase, but the problem never reoccurred after the Quaker State oil was replaced. I also once saw first hand the results of long term use of Quaker State 10W40 in a 1978 Oldsmobile 350. It was not pretty. We literally had to scoop the "stuff" out of the lifter valley with a putty knife. I don't suppose it was parifin ; )
Of course now Quaker State is part of Pennzoil - Quaker State which is owned by Shell. I do wonder how a supposedly reputable company like Shell rationalizes selling Slick 50 (another Pennzoil - Quaker State product).
Regards,
Ed White
Larry Smith wrote: