The Ford Barn

38 coupe · 06-01-2024, 09:16 AM

Asking what oil to run is a dangerous thing on an internet forum. You will get lots of opinions. You will also be warned about zinc. Please be aware that zinc (ZDDP) was added to oil in the late 50s, well after our engines were built and run with no problems. Zinc is needed for higher rpm overhead valve pushrod engines with lots more valve spring pressure than we run. You don't need to worry about zinc in your 1952 Ford engine.

I use 15W40 diesel oil and find I have better hot idle oil pressure. Your situation may vary.
Also, if you have a flathead V8 with an oil filter, does it have the proper restrictor fitting at the oil filter inlet?

06-01-2024, 09:16 AM	#2
38 coupe Senior Member Join Date: May 2010 Location: South Texas Posts: 2,137	Re: What weight oil should I use - Brand? Asking what oil to run is a dangerous thing on an internet forum. You will get lots of opinions. You will also be warned about zinc. Please be aware that zinc (ZDDP) was added to oil in the late 50s, well after our engines were built and run with no problems. Zinc is needed for higher rpm overhead valve pushrod engines with lots more valve spring pressure than we run. You don't need to worry about zinc in your 1952 Ford engine. I use 15W40 diesel oil and find I have better hot idle oil pressure. Your situation may vary. Also, if you have a flathead V8 with an oil filter, does it have the proper restrictor fitting at the oil filter inlet? Last edited by 38 coupe; 06-01-2024 at 08:17 PM.