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In this Discussion
- 46HudsonPU May 2012
- charles4d May 2012
- corangerroadrunnercom May 2012
- Huddy42 May 2012
- Lee ODell December 2012
- rbennett47 May 2012
- Rod December 2012
- Tallent R December 2012
- Trulyvintage May 2012
Which oil to use
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OK, I know this has been discussed several times on the old forum [which I can't get] , but I'd like to know what oil to put in my 50 mash 6. It calls for 20 weight which I see is sold by amsoil. I would think a multi vicosciy oil [modern] would be better. what do some of you use. It' a low mileage motor that runs like a top and I'd like to keep it that way. Any help is appreciated. Thanks, Jim K
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I've been running Castrol 10-40, with STP added for the ZDDP in my '54 Hornet...
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Jim,
If I were you .....
I would buy the best oil filter possible with the highest filtering content.
Drain your oil and add Rotella 15/40 diesel engine oil but allow enough for a can
of SeaFoam in the refill.
Then run your engine at least for a few hours at idle, if you can
try taking it on some short trips it can handle.
Diesel engine oil is high in zinc and higher in cleansing
additives to help clean out upper cylinder and carbon deposits.
SeaFoam is great for gentle and efficient carbon and sludge removal.
Jim
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Jim, What is sea foam and where do you buy it? I did have a problem with a couple sticky valves which seem to be because of carbon build up. Also, after running it for a couple hours do I drain the oil? What do I replace it with? Thanks ,Jim
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Run it for several hundred miles at operating temperature,
or watch it at idle - change RPM occasionally - do not let your engine overheat !
Seafoam can be found at Walmart or any auto parts store.
FYI - I tow my trailer with an older Ford F350 IDI diesel 7.3
and I add Marvel Mystery Oil to my Rotella engine oil
to help keep the valves clean .....
Marvel Mystery Oil is another great product,
but I find it works better over several thousand miles
of highway driving.
Whatever product you use, it has to be run with
the engine at operating temperature for dozens
of hours or hundreds of miles to do any good.
Jim -
Your engine will work perfectly on any HD oil on the market. Even the low priced ones have to meet manufacturers specs. When your car was built there was no ZDDP in the oil at all. With your low valve spring pressures the ZDDP does absoluely nothing in your engine. And I mean ABSOLUTELY NOTHING! Any modern oil is vastly superior to what was available in 1950.
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From what I have seen the only real reason NOT to put modern oil in a old motor is the possibility the old oil pan is full of sediment. The modern deteregnts break this loose and you have grit floating around and eventualy clogging the oil pump screen (this happened to me 351 ford V8).
Any way to be sure pull the pan and clean it out good then use good grade oil. Add the ZDDP if you want -wont hurt anything.
The old non detergent oil was meant to let the dirt settle in pan to be drained out. When Detergent oils came along a filter had to be added . Because the detergent keeps the dirt in suspention so the filter will catch it.
Roger
Retired Tech. -
A few years ago I was looking for detergent oil to look at the label. The detergent oil was hard to find. When I finally located some, the label clearly said not to use it in automotive engines. I don't recall if it stated at all what it would be good for. I have used 10-30 or 20-40 since the 60's. In the 80's I tried synthetic oil in two of my older cars 69 AMX and 64 El Camino and both cars started leaking oil from main seals shortly after changing to synthetic. Haven't used it since. After that I was told synthetic oils in older cars will find a place to leak if it is possible. When I bought my Hudson a couple years ago my uncle told me he uses diesel oil and that it was less expensive than the usual oils, so I have been trying it in my Hudson. So far so good.
Lee O'Dell
