Yes, I have heard of that stuff as well.I have been using Zboost from motorhead oil. ZDDP additive.I would think both would be fine.take your pick I guess. Brian

Seems to me there was a forum on this subject for a 51 "200" some time back.Same problems I am sure. Brian

By the way all.Do any of you know if those springs are avalible? Brian

I am sure it is ok but according to Motor Head their HI-Z has more of the additives in question.And its cheep.Not to mention the industry is always changing standards.With the additive it really doesnot matter what you use. I favor Valvolive 30wt myself.Remember the book says the light will "flicker" at idle.or even stay on.All this means is the pressure is 5 lbs or less. (Dont quote me here.)My jist is this is normal.When R.P.M. goes up even a little it goes out.My car did this as well at first.It did seem to stay on longer than I would have liked.Hense the Spacer under the spring.By the way make sure your pump is in good shape.(Mine had no detecticable wear.)Most likely a weak spring.Gee after 58 years I would guess thats ok.I hope this helps. Brian

You can also put a shim under the oil pump spring to help with the pressure.(IE:an old nut.This works as well.An old fix too.I am not sure 50 wt is the answer.Yes that is an old remedy but how do you know its cooler unless you have guages to tell you so.Also thicker oil flows more slowly.I think you would be better off checking the oil pump,and maybe shimming up the spring than going with such heavy oil.Also, does it have enough zink and phosporous?I doubt it. Brian

Dont do it.You will almost need a parts car to do it.Nothing wrong with the ultramatic.No you wont be "HOTRODDING" any one but afterall we are not talking about a Chevy or Ford this is after all a luxury car.On the other hand I am a bit narrow minded on this subject.I also once told someone at a car show who asked me what I thought of a "rat rod" of a Packard.Yeah, I told him I thought it was the most idiotic idea I had ever heard of.Yeah, he walked away from me in silence.I just hope he took my advice. sorry you "rodders" Brian

I am not sure there is enough zinc or phosporus in modern oils.This is why people go to the diesel oil. They have more Z and PH. I do know the first thing you MUST do is drop the oil pan and get the 1/4 inch of old sludge out of the pan and any where else you find it.If you dont...That nice new oil will clean out your engine and run it thru your motor."Not" good get as much as you can out first.From what I understand.(Minimal possibly at worst.)Is there is more metal to metal contact in older engines.The old additives are needed. Brian

Thanks Big kev and Owen,Great new info for me.I will have to write that down for my records.It seems mine is in error.thanks again. Brian

Yes, It seems our cars are the same.I didnt see the Ultramatic script on yours however.Has your car got the Ultramatic? My trim code is 71a I dont know the difference.It still says Grey Bedford cord stripped.Really its felted wool. Brian

Oh, Ok I have never heard them called that before.Arent those the Briggs body number? At least that is what I was told. Brian