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EFV-8 Club Forum / General Ford Discussion / motor oil

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Discussion Topic: motor oil -- page: 1 2

Stroker

04-29-2012 @ 7:45 AM

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Joe: What a lovely chopped 3-Window. It is SO refreshing to view one that doesn't have
a "Mouse" installed.

51f1

04-29-2012 @ 6:46 AM

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I'm not a fan adding anything to lubricating oil, and I don't think ZDDP is necessary either. ZDDP additives cost as much as the oil for an oil change. ZDDP wasn't even in oil 70 years ago, when most of our cars were built Does anyone have more than anecdotal evidence or opinions that we need ZDDP in our old engines?

Richard

This message was edited by 51f1 on 4-29-12 @ 6:48 AM

joe b

04-29-2012 @ 5:49 AM

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OH WOW! What a BEAUTIFUL rod. My dream car

slyck14

04-28-2012 @ 10:09 PM

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Thanks for the input! I don't see that it can hurt for either flathead, the '46 or the '34 Three Window Coupe Hot Rod that is the latest addition to my stable.

Joe Syslo
Fort Worth, Texas
1946 Ford Business Coupe

mrtexas

04-28-2012 @ 10:16 AM

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I thought this might be interesting to some on the forum. At the refinery I worked at for 31 years the lube dewaxing units and one aromatic extraction unit were built in the 1930s. The other aromatic extraction units were from the 50s. They are still running today without much changed. I would think the difference in quality of oils today would have to be in the additives. For automotive motor oils additives can make up as much as 25%+ of the volume of oil. Interesting enough the additives were made in chemical plants not refineries.

Stroker

04-28-2012 @ 8:05 AM

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Just about any decent "racing oil" such as Valvoline, Kendall, Royal Purple etc. will handle the additional contact loads encountered in performance flatheads without adding any "mouse milk".

Old Henry

04-28-2012 @ 6:26 AM

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If the valve spring pressure is greater than stock it would need the ZDDP supplemented. Wouldn't hurt to put it in just to be sure.

I found ZDDP cheapest here: http://www.eastwood.com/ew-zddp-oil-additive-4-oz.html

Old Henry
(The older I get, the better old looks.)

slyck14

04-27-2012 @ 10:02 PM

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OK, now I would like to chase this discussion just a little further...I have a blown Motor City flathead with solid lifters. The former owner insisted on the Zinc additive due to the solids. More smoke and mirrors or a good idea? Thanks in advance.

Joe Syslo
Fort Worth, Texas
1946 Ford Business Coupe

supereal

04-24-2012 @ 3:05 PM

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Joe: It is a zinc compound. It is required for metal to metal contact under high pressure, such as non-roller valve lifters. The reason it was reduced in motor oil formulation was because it tends to foul the catalytic converters. Our old flaheads lasted decades witn oil that is vastly inferior to the current formulas. We have seen the "fast buck" boys jump on lots of changes. They predicted valve problems with unleaded gas, and flacked lead additives. At our shop, we do all kinds of valve work, and have yet to see the dire consequences of the lack of lead. Most additives are designed to grease your wallet.

Old Henry

04-24-2012 @ 9:44 AM

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Zinc dialkyldithiophosphates. Read more here: http://www.zddplus.com/TechBrief1%20-%20Introducing%20ZDDPlus.pdf

But caution: That information is provided by a company that sells ZDDP so is promoting the use of it. After I started using it I read a scientific article from actual testing of metal surface wear affected by ZDDP at various pressures that concluded that, with the low valve spring pressures of our flathead engines, there was no need for any higher concentration of ZDDP in oils than what was still in modern oils.

I'm looking for that article that was very credible and informative to share. If I find it I'll add a link to it.

However, even though I don't think that ZDDP needs to be supplemented for our engines, I do it anyway just in case it may help in some way. Probably overkill but I tend to "err on the side of caution."

If you want to use it you can get it cheaper than ZDDPlus sells it here: http://www.eastwood.com/ew-zddp-oil-additive-4-oz.html

Old Henry
(The older I get, the better old looks.)

This message was edited by Old Henry on 4-24-12 @ 10:36 PM

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