What is right amount (PPM or %) of ZDDP in an oil which is best for an old 218 engine with LOTS of miles? And is there an oil I can get off the shielf in California?
Thanks
Thanks
48 Plymouth in need of the right ZDDP (ZDP) Oil
- Thread starter Oldwoodieguy
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1948 Plymouths would have used an oil with very little ZDDP, as it was not commonly used until the late 1950s in high amounts.
Just about any oil would work in something of that age in a 10W-30, 10W-40 or straight 30 grade, I would imagine.
Just about any oil would work in something of that age in a 10W-30, 10W-40 or straight 30 grade, I would imagine.
I agree with MGregoir. And
to BITOG
I agree too. The cheapest dollar store SA grade oil would be better than what they used when the car was new.
Considering your climate and the fact that the engine has a bit of wear, any decent 1W-30 oil or even a decent straight 30 weight would be a good choice.
From a 1946 Chrysler owners manual at:
http://www.oldcarmanualproject.com
Considering your climate and the fact that the engine has a bit of wear, any decent 1W-30 oil or even a decent straight 30 weight would be a good choice.
From a 1946 Chrysler owners manual at:
http://www.oldcarmanualproject.com
AutoRX on a 1948 Plymouth?
That'd be a different one.
That'd be a different one.
OVERKILL
$100 Site Donor 2021
We used to run Castrol or Valvoline SAE 30 non-detergent in most of our old boat engines.
Those old flatheads had VERY soft valve springs with correspondingly low pressures on the cam/lifters. The real problem with those engines is the exceedingly poor crankcase ventilation; were it mine I would probably run SuperTech 5w-30 dino oil and change it every 1000 miles or every year whichever came first.
This type vehicle REALLY needs the oil changed frequently. A neighbor of mine was an automotive machinist back in the 1950's; he told of rebuilding Chrysler flathead sixes that were used as stationary pump engines in the oil fields at that time. They were operated 24/7 so never cooled off, he said the crankcases were completely full of sludge, the con rods actually scooped a trough through the sludge.
He thought poor crankcase ventilation was the culprit.
Joe
This type vehicle REALLY needs the oil changed frequently. A neighbor of mine was an automotive machinist back in the 1950's; he told of rebuilding Chrysler flathead sixes that were used as stationary pump engines in the oil fields at that time. They were operated 24/7 so never cooled off, he said the crankcases were completely full of sludge, the con rods actually scooped a trough through the sludge.
He thought poor crankcase ventilation was the culprit.
Joe
Retrofitting a PCV system with a catch can would help greatly, as these were designed on a road draft tube system that depends on a low pressure area to vacuum out the crankcase vapors.
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