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Old 11-02-2020, 03:26 PM   #1
Joe Immler
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Default ZDDP oil additive

I called C&G Ford Parts to purchase ZDDP for my Coupe's winter oil change.
They said it is no longer on the market.
Any ideas/suggestions?
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Old 11-02-2020, 03:35 PM   #2
WABOOM
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Default Re: ZDDP oil additive

It's still "on the market". Order it from somewhere else. Ebay, Jegs, Summit, Amazon,
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Old 11-02-2020, 04:02 PM   #3
50fordcoupeman
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Default Re: ZDDP oil additive

Use an oil with enough already in it?
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Old 11-02-2020, 04:52 PM   #4
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Default Re: ZDDP oil additive

I have been using Marvel Mystery's classic car oil. It has Zinc in it and formulated for antique cars. Right now on their site they are buy 2 get one free, so I stocked up heavily last week

https://shop.marvelmysteryoil.com/co...motor-oil-32oz
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Old 11-02-2020, 08:29 PM   #5
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Default Re: ZDDP oil additive

With the low valve spring pressure the stock flatheads have, any currently available motor oil with a valid API rating has enough zinc. If you are still worried about the zinc content. any name brand oil with a "50" in the weight has more than enough zinc in it for even the highest valve spring pressures. I currently run Mobil 1 15-50 in the hemi in my race car with an Engle roller tappet cam that has dual springs with no problems for the last 25 years.

To make along story short, guys with stock flatheads don't need to worry about zinc as long as you use any commonly available API-rated oil.

Just don't use non-detergent.
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Old 11-02-2020, 08:52 PM   #6
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Default Re: ZDDP oil additive

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STP in the blue bottle, has it on the label. I what I use. 8 ba with early heads in a 40, and a French block in a 34. Easy to find, problem solved.
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Old 11-02-2020, 09:38 PM   #7
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Default Re: ZDDP oil additive

Been using any regular oil for 25 years in mine. Whatever is on sale. No extra ZDDP needed.
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Old 11-03-2020, 01:17 AM   #8
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Default Re: ZDDP oil additive

Quote:
Originally Posted by flatjack9 View Post
Been using any regular oil for 25 years in mine. Whatever is on sale. No extra ZDDP needed.
Me too !
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Old 11-03-2020, 12:48 PM   #9
Kurt in NJ
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Default Re: ZDDP oil additive

Sometimes the xtra additive clashes with the original oils additive packaging and you end up with something less suited for the use
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Old 11-03-2020, 01:30 PM   #10
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Default Re: ZDDP oil additive

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Originally Posted by Kurt in NJ View Post
Sometimes the xtra additive clashes with the original oils additive packaging and you end up with something less suited for the use
This is an excellent point.

I will repeat, any currently available oil with a valid automotive API rating is more than sufficient for a stock flathead just as it comes out of the bottle.
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Old 11-03-2020, 01:44 PM   #11
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Default Re: ZDDP oil additive

2x what tubmans posted.
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Old 11-03-2020, 04:10 PM   #12
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Default Re: ZDDP oil additive

I am running a higher lift cam and Zephyr valve springs, so I feel more comfortable with more zinc than regular API oil. My solution: one quart of Valvoline TR1 racing oil for the zinc, three quarts of any good API oil for the detergent, and a pint of Marvel Mystery Oil because every flathead guru I have ever known says it works.
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Old 11-03-2020, 08:23 PM   #13
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Default Re: ZDDP oil additive

Thank you all.
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Old 11-03-2020, 08:40 PM   #14
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Default Re: ZDDP oil additive

Will not start any of my engines without adding bottle of zddp. Cheap insurance
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Old 11-04-2020, 09:05 AM   #15
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Default Re: ZDDP oil additive

I use 3 - 4 ounces of this Lucas product # 10063. Available at NAPA
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Old 11-04-2020, 09:25 AM   #16
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Default Re: ZDDP oil additive

I got ZDDP at O'Reillys and will service the coupe today.
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Old 11-04-2020, 01:39 PM   #17
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Default Re: ZDDP oil additive

  • Real ZDDP Zinc, Not a Substitute
  • Increases Engine Life
  • Makes Newer Oils Work in Older Engines
  • Protecting Engines Since 1921
  • Rislone Hy-per Lube Engine Oil ZDDP Supplement is a petroleum oil performance supplement “booster” containing high levels of ZDDP (zinc dialkyldithiophosphate) Zinc and Phosphorus additives along with mixed esters to help better protect internal engine components including pistons, flat tappet camshafts, lifters and the valvetrain. This is especially important at engine start up, when most wear is done. That is why they say one of the worst things you can do is start your engine.
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Last edited by petehoovie; 11-04-2020 at 03:07 PM.
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Old 11-04-2020, 02:52 PM   #18
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Default Re: ZDDP oil additive

Quote:
Originally Posted by Joe Immler View Post
I called C&G Ford Parts to purchase ZDDP for my Coupe's winter oil change.
They said it is no longer on the market.
Any ideas/suggestions?

You don't need the ZDDP.
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Old 11-04-2020, 03:22 PM   #19
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Default Re: ZDDP oil additive

Using VR-1 for years
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Old 11-04-2020, 03:27 PM   #20
Joe Immler
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Default Re: ZDDP oil additive

Pete That is what I bought at O'Reillys. Thanks for the reply.
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