Hello I wonder if that is what caused the O2 sensors at the rack to burn out? I had heard of a few racers buring out the 4 wire models so i bought the 3 wire. Would the film cause it to short out? I will run the racing pennzoil 25-50 with zinc and phos. no matter what. Randy H.
info that said > the manufactures were the ones who asked for a reduction in the ZDDP > additives. > The reason stated was that those additives were leaving a film on the o2 > sensors. It made no mention of the cat converters. The new emission laws > requires the manufactures to cover emissions equipment for 100k miles. > And the film was causing early failures. > Whatever the reason, I agree with using a oil with a high ZDDP on all > engines. > > Joe Walters > 73 H/O > > > > > >
