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02-19-2016, 10:48 PM | #1 |
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Zinc in motor oil?
My local mechanic told me that I should run a motor oil with zinc in it. Is this true? He said that it has something to do with the old bearings. If I should be running oil with zinc can anyone recommend an oil ( brand and weight ) with zinc already in it? I know I can buy a bottle of zinc additive.
Thanks, Jeff Perry |
02-19-2016, 10:51 PM | #2 |
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Re: Zinc in motor oil?
I use rotella 15w40 and Mobil-1 15w50....both have enough zinc for the A engine
Last edited by Mitch//pa; 02-19-2016 at 10:59 PM. |
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02-19-2016, 10:57 PM | #3 |
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Re: Zinc in motor oil?
I agree with Mitch......I run Rotella, I learned that from previous posts.
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02-19-2016, 10:57 PM | #4 |
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Re: Zinc in motor oil?
Just google "fordbarn; zinc"
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02-19-2016, 11:03 PM | #5 |
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Re: Zinc in motor oil?
Jeff,
Model A engines need zinc as an anti-wear agent. There are threads that go into the technical details, so I won't go into it here. You can buy the additives separately, or there are oils that have the additives already mixed in. I have been using Brad Penn (Penn Grade1) It has the Zinc and phosphorous additives already mixed in. Others will have their own preference, but I am very happy with the performance of this oil. I buy it through Amazon. |
02-19-2016, 11:40 PM | #6 |
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Re: Zinc in motor oil?
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Original oil didn't contain phosphorus, the cam didn't require it then or now. A's Always Dave |
02-19-2016, 11:52 PM | #7 | |
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Re: Zinc in motor oil?
Quote:
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02-20-2016, 12:18 AM | #8 |
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Re: Zinc in motor oil?
You are 100% right, Dave! This zinc myth just won't die! Any modern oil will work just fine; they all have more than enough additives for an A, including zinc. Maybe if you have high pressure valve springs to turn 6,000+ RPM or more, you may need the zinc. Otherwise, let this myth die a deserved death!
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02-20-2016, 12:45 AM | #9 |
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Re: Zinc in motor oil?
Cams have a thin line of contact with the tappet, and in addition the contact is a wiping action as the cam lobe scrapes across on the flat tappet surface. The Model A has relatively light valve springs compared to modern engines, but I still feel any added protection can only benefit the engine and retard wear. I like oil with zinc and also use Rotella 15-40.
Modern cams use rollers against the lobes, so the zinc isn't needed, and the catalytic convertor also can't tolerate the zinc. |
02-20-2016, 01:37 AM | #10 |
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Re: Zinc in motor oil?
just use whatever oil you please and put stp oil treatment in, its #1 ingredient is ZDDP aka zinc.
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02-20-2016, 04:47 AM | #11 |
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Re: Zinc in motor oil?
Thank you all for the replies. I'm not trying to get any arguments started, I was just wanting to know if this is something I need or not. I think I agree with Tom Wesenberg. It may not need the zinc but if it does help even a little bit then why not. If there is a $20 per quart price difference then I probably won't be using it.
Thanks, Jeff |
02-20-2016, 06:01 AM | #12 |
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Re: Zinc in motor oil?
Is the "ZINC" really a smooth "metal" like substance, that reduces friction???
Bill W.
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02-20-2016, 08:30 AM | #13 |
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Re: Zinc in motor oil?
Read Lake Speed's son's article about oil. He is an oil specialist engineer for Joe Gibbs racing. Detergent oil actually removes the zinc layer, which has already correctly been said really in not needed in old cars.
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02-20-2016, 08:59 AM | #14 |
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Re: Zinc in motor oil?
Here's a one link that's interesting reading about zinc in motor oil:
http://blog.hemmings.com/index.php/2...older-engines/
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02-20-2016, 09:07 AM | #15 |
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Re: Zinc in motor oil?
A JOKE ...
Last edited by Mitch//pa; 02-20-2016 at 09:32 AM. |
02-20-2016, 09:10 AM | #16 |
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Re: Zinc in motor oil?
Most Diesel motor oils (like Rotela T) have higher levels of zinc and are quite reasonable, I just use Co-Op DMO 15-40 in all my old engines and it runs about $4 per litre (Canadian $) If you look around places like Tractor Supply and big truck shops usually have DMO on sale a few times a year.
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02-20-2016, 09:27 AM | #17 |
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Re: Zinc in motor oil?
This what I use.
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02-20-2016, 09:40 AM | #18 | |
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Re: Zinc in motor oil?
ZDDP really does nothing for you in a Model A Ford engine. ZDDP was developed to combat scuffing wear experienced in ultra high performance engines that became available in the 1955 model year. The scuffing was destroying camshaft lobes and lifters when valve spring pressure exceeded 300 pounds open pressure.
Forces in a Model A Ford engine do not approach these numbers, so it is a non - issue. It's sort of like using Perrier in your radiator - it will cost more, but won't affect anything. Any modern oil of appropriate viscosity for the ambient air temperature will work fine. Just change the oil frequently to keep it clean. If you have a muscle car with lots of valve spring pressure and a flat tappet cam, by all means use an oil with good ZDDP content. Quote:
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02-20-2016, 10:39 AM | #19 |
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Re: Zinc in motor oil?
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02-20-2016, 10:49 AM | #20 | |
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Re: Zinc in motor oil?
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02-20-2016, 10:49 AM | #21 |
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Re: Zinc in motor oil?
being somone that has worked on MANY antique tractors and has farmed with them, i can tell you now that any oil is better then no oil! any oil (of the proper viscosity) is better than they had when they were new, until the last few years zinc in the oil was not really much of a debate with them, we have just used standard napa oil, and they preform and wear perfectly fine.
But i Just last week got done overhauling a G john deere, i had a chunk of change stuck in it so i took all measures to protect the new engine, I used AMSOIL 30 weight break in oil with added zinc, In the long run, it may be just a "feel good" addition, but if it helps the engine in any way it is a plus, Oil is cheap engines are not john |
02-20-2016, 11:01 AM | #22 |
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Re: Zinc in motor oil?
Since 1956 when I started to play with engines, I have never seen a properly maintained engine fail attributed to the performance of motor oil, and that includes modern motor oils with reduced / no zinc additive.
In my opinion, modern motor oils contain all that is necessary for antique engines to perform well, and much better than their designers imagined.
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02-22-2016, 01:08 AM | #23 |
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Re: Zinc in motor oil?
The added zinc will not hurt the engine. If you feel better using it do so. While that may sound a little harsh, when we drive our cars we should only be concerned with driving it and not have some nagging thought that "am I hurting" the engine. This is my opinion on all additives that can be used in the A. A whole lot of people use them and a whole lot don't. If you feel better using it go right ahead a do so.
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02-22-2016, 08:26 AM | #24 |
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Re: Zinc in motor oil?
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02-22-2016, 08:48 AM | #25 | |
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Re: Zinc in motor oil?
Bravissimo! Many Mod A owners get too wound up on the false idea that their car has a Meyer-Drake, Offy engine or a finely tuned antique European sports car engine that must be babied and worshiped on off days. Taint so! The mod A engine is a rather primitive, simplistic workhorse of a machine. It worked well for what it was. It was well made, but I could have given Henry Ford a few pointers about engine longevity. Didn't I read somewhere the Mod A was only expected to last ten years? Consider this, The mod A was produced as we went into the depression. The average person just didn't have any cash for an oil change. Then the war came along and you couldn't get oil. Yet these maintainanced starved vehicles soldiered on. Also, The best oils of the 1930s weren't as good as the worst oils of today!
Terry Quote:
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02-22-2016, 11:47 AM | #26 |
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Re: Zinc in motor oil?
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