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I recently put a 1959 235 in my 1955 wagon, I had to swap out the oil pan, and fabricate some engine mounts. My question is what's the best engine oil to use in these engines. When I opened up the oil pan the inside of the engine looked like it had just been rebuilt, the bottom of the pistons looked new and there was no sludge or gunk in the pan. Any information would be greatly appreciated.
Manuel
 

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ZDDP

You will received many recommendations. Know this, zinc, once prevalent in motor oils, to protect flat tappet cams and lifter faces, is greatly diminished. I recommend Valvoline VR-1 racing 10W-30 as a replacement.

Many owners choose their favorite oil, and include a quantity of zinc additive with each oil change.
 

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I have never used straight weight oil in any of my 235's (35 years worth). I have always run multi viscosity detergent, generally 10-30 sometimes 10-40 depending on the age of the motor. As of late I have been using Brad Penn oil for the zinc.
 

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RIP 02-03-2022
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You will received many recommendations. Know this, zinc, once prevalent in motor oils, to protect flat tappet cams and lifter faces, is greatly diminished. I recommend Valvoline VR-1 racing 10W-30 as a replacement.

Many owners choose their favorite oil, and include a quantity of zinc additive with each oil change.
Thats what I do with Rotella.....:anim_25:
:gba:
bowtie-trifive
 
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