Re: New available motor oil

Posted by 55PackardGuy On 2014/8/17 15:18:15

It wasn't the oil pressure sender at all. It appears to have been either the Valvoline straight 30 weight or the Marvel Mystery Oil it didn't like. (The MM oil was at about 30:1 ratio. Doesn't seem it would matter that much, and if it was just that, why didn't adding STP make any difference? Anyway, after changing out to the new oil pressure sender switch and having the light come on again, I decided to start at ground zero, changed to 30 weight Castrol "HD" and put the old sending unit back in. Whoopee! No oil pressure light!