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#1 |
Senior Member
Join Date: Mar 2013
Location: New Zealand
Posts: 366
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I have just bought some Havoline 20-W50 oil for my Model A. I bought it because it says "better wear protection for older engines". But then I noticed it also says API SJ. I recall reading somewhere that it should be API SC for Model As? I know some guys think its not important but I want to get it right if possible.
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#2 |
Senior Member
Join Date: May 2016
Location: Scottsdale, Arizona
Posts: 612
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Good Evening...Model A Engines should have SN engine oil according to a recent article in Model A Times...Give it a read and then decide...Ernie in Arizona
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#3 |
Senior Member
Join Date: May 2010
Location: PASADENA, CA
Posts: 1,884
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The 20-W50 oil will work just fine in your Model A. This is way better stuff than what was available when your Model A was new.
Chris W. |
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#4 | |
Senior Member
Join Date: Jul 2012
Location: Australia/USA/EU/Soviet Russia
Posts: 1,105
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![]() Quote:
SJ is more than good for an A. SC oil will be hard to find and expensive if you do.
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#5 |
Senior Member
Join Date: Mar 2013
Location: New Zealand
Posts: 366
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#6 |
Senior Member
Join Date: Apr 2019
Location: Mt. Pleasant, SC
Posts: 601
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Jim |
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#7 |
Senior Member
Join Date: Jul 2012
Location: Australia/USA/EU/Soviet Russia
Posts: 1,105
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![]() The cheap oil at Walmart is SN.
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#8 |
Senior Member
Join Date: Nov 2015
Location: Tennessee
Posts: 714
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Rotella T and don't worry about the little stuff.
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#9 |
Senior Member
Join Date: Aug 2018
Posts: 2,332
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Zinc is not needed after break in on the A motor, zinc was added later due to higher engine speeds requiring stiffer valve springs to prevent valve float.
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#10 |
Senior Member
Join Date: Sep 2019
Location: The Villages, FL
Posts: 103
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What Rotella do you use? T4?
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#11 | |
Senior Member
Join Date: Jul 2011
Location: Redondo Beach, CA
Posts: 5,849
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![]() Quote:
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#12 |
Senior Member
Join Date: Aug 2018
Posts: 2,332
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If you do a search, tons of discussion on this. I consider this a good thread.
https://www.fordbarn.com/forum/showthread.php?t=159816 Too much Zinc is bad, more is not better. I use Rotella T4, has some zinc, might help, but should do no harm unless too much zinc is added. I personally do not believe Zinc is required in the Model A motor.. Opinions vary. |
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#13 |
Senior Member
Join Date: Jul 2012
Location: Australia/USA/EU/Soviet Russia
Posts: 1,105
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![]() Rotella is the little stuff.
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