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40ford · 08-15-2020, 07:52 AM

This sure has always been a big discussion on here.Motor oils today are so much better than 75 years ago!I have to ask,why the use of "fancy" oil with zinc in it?Looks like to me this zinc would just help to gum up an engine.I have been driving flatheads for many years and use super tech 20-50(wal-mart brand)with no issues.Sorry,just my 2 cents.Your going to get a lot of different opinions on this.

08-15-2020, 07:52 AM	#3
40ford Senior Member Join Date: May 2010 Location: Cherryville,N.C. Posts: 535	Re: Cleaning engine out in '40 Sedan This sure has always been a big discussion on here.Motor oils today are so much better than 75 years ago!I have to ask,why the use of "fancy" oil with zinc in it?Looks like to me this zinc would just help to gum up an engine.I have been driving flatheads for many years and use super tech 20-50(wal-mart brand)with no issues.Sorry,just my 2 cents.Your going to get a lot of different opinions on this.