Adding Zinc additive to oil? - JeepForum.com
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post #1 of 24 Old 02-17-2021, 11:06 AM Thread Starter
Joncure
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Adding Zinc additive to oil?

Quick question,

I'm about to change the oil and have a 15oz bottle of zinc additive to put in with it. Do you guys just add the zinc additive to the engine with all 6qts of oil so you're adding 6qts/15oz of liquid to engine or do you leave out 15oz of oil to make up for the extra 15oz of zinc? Or does it not matter that much?

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post #2 of 24 Old 02-17-2021, 11:07 AM Thread Starter
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The directions on the bottle say to add to 4-5 qts of oil.
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post #3 of 24 Old 02-17-2021, 11:45 AM
StoneTower
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We use Lucas Oil 10063 Engine Break In Oil Additive in my son's 66 Mustang with a souped up 289 with a solid lifter can. I talked to Lucas and they said after break in, I could use 1/3 to 1/2 of a bottle with a quality oil on each change. We use Castrol high mileage 10w-40 and it seems to be working so far. We use 1/2 the bottle because the engine has an 8 quart pan.
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post #4 of 24 Old 02-17-2021, 12:25 PM
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Yikes... This is a hot topic.

The "regular" automotive engine oils have HAD to reduce their ZDDP and Phosphor in their regular engine oil to protect the catalytic converter.

Not so with the "non-regular" engine oils like; Diesel oil, Racing oil, 4 stroke motorcycle oil, Vintage oil's, etc.
These oils have more of the ZDDP & Phosphors in them as they don't have catalytic convertors to protect.

The "Power Sport" oils typically have 2200 plus ZDDP & equal in Phosphors. (you need to check the mfg's data if it really matters)

When changing oils on a NON-catalytic converter engine/vehicle, I try to use a higher ZDDP NON-automotive engine oil. (some like Valvoline VR-1 racing oil, your choice)

I also add the RED LINE engine break-in oil #81403 for additional ZDDP. 16oz for 12 quarts, 16oz divided 12 qts = 1.33 oz per quart x 5 = 6.6 oz per oil change.... BUT, because I already use a suitable oil and reasonable ZDDP levels, I only use 1/4 bottle 4 oz additional. There is no sense in wasting the ZDDP additive when using good ZDDP oil. IMHO

Many here that are much smarter than I am will chime in because we all have our ways around the lowered levels of ZDDP in "regular engine oils" designed to help save the catalytic convertor.

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post #5 of 24 Old 02-17-2021, 03:18 PM
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I prefer some extra ZDDP for my in-line 6 Jeep motors. I just add a bottle of STP or Rislone to each oil change.

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not to overthrow the Constitution but to overthrow the men who would pervert the Constitution” Abraham Lincoln, 1859.
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post #6 of 24 Old 02-17-2021, 03:55 PM Thread Starter
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Thanks guys.

I too use the STP additive. I poured the whole bottle in with the oil (Valvoline 10W-30, conventional) I also poured a little Sea Foam in there this time too.
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post #7 of 24 Old 02-17-2021, 07:12 PM
oldschool74cj5
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hello

this is the dzzp additive that i have been using for the last few years. i run it with 10w40 oil. havent had a problem so far.

https://www.amazon.com/Rislone-4405-...3614253&sr=8-5

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post #8 of 24 Old 02-17-2021, 07:36 PM
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I use this.........

Amsoil Z-ROD® 10W-40 Synthetic Motor Oil

and don't use extra additive.

JS
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post #9 of 24 Old 02-17-2021, 11:30 PM
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post #10 of 24 Old 02-17-2021, 11:34 PM
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post #11 of 24 Old 02-18-2021, 04:00 AM
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That dude, 540Rat, has been laughed off the internet on nearly every forum he posted that stuff on by actual professionals and the occasional tribologist who was directed there for comment. He used a variation of the "one arm bandit" testing mechanism that snake oil salesmen used to push their product on the Home Shopping Channel at 3AM.

A lot of guys who know what they're doing say if a particular compound wasn't formulated with the original additive pack and blended with the base stock, it'll just fall out of suspension and do nothing for you. Other guys swear by something because they never had a failure that they could trace back to using a particular additive.

Beats me...


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post #12 of 24 Old 02-18-2021, 06:02 AM
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Yeah, it's amazing how long that misinformation has been floating around the internet, Shawn. Some myths never die.

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post #13 of 24 Old 02-18-2021, 06:14 AM Thread Starter
Joncure
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So that long, oil ranking post is inaccurate?
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post #14 of 24 Old 02-18-2021, 08:24 AM
DougE
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KISS. Just use Shell Rotella for diesels.

1983 CJ7, 258I6, T4, Dana 300, 31x10.5x15 DuraTrac
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post #15 of 24 Old 02-18-2021, 10:10 AM
StoneTower
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I started chasing Shell Rotella when my son got his 1966 Mustang. From my reading, some say that the Rotella has been reformulated too and no longer has the same additives. I have read that the additives were removed because they damaged catalytic converters. There is so much incorrect information on the internet now it is very difficult to make informed decisions sometimes. This is why I called Lucas and they told me that after break in, use 1/3 to 1/2 of a bottle with each oil change and use a quality oil. They tried to sell me on their Hot Rod oil but I told them that we could not afford that for a daily driver. I buy Walmart Castrol High Mileage 10w-40 for about $18.00 for 5 quarts and then I and 1/2 a bottle of the Lucas 10063 which I buy in bulk (4 bottles at a time) which comes to about $12.00 per bottle with shipping. The 1/2 bottle of Lucas 10063 adds about $6.00 to each oil change which is far cheaper than purchasing the Lucas Hot Rod oil at about $35.00 per 4 quarts when I get 5 of the Castrol for $18.00. An 8 quart oil pan makes oil changes on a daily driver all that more expensive. YMMV

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Originally Posted by DougE View Post
KISS. Just use Shell Rotella for diesels.
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