Lucas Motor Oil has high ZDDP. Good for Flat Tappet Cams. - JeepForum.com
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Unread 06-29-2011, 11:14 AM   #1
bst123
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Lucas Motor Oil has high ZDDP. Good for Flat Tappet Cams.

I recently contacted the technical department of Lucas oil and inquired about the ZDDP content of the Lucas motor oils.

Here is what I was told
Standard 30W = 1265 parts per million
Standard 20W50 = 1265 parts per million
Standard 10W30 = 900 parts per million (has the seal oil industry seal and cannot exceed 900)
Racing synthetic 10W30 = 3031 parts per million
Racing synthetic 10W40 = 3031 parts per million
Racing synthetic 20W50 = 3031 parts per million

Here is a link to this oil http://www.lucasoiloffroad.com/lucas...SAE_10W-30.pdf

I have been using 10W30 Kohler Universal Engine oil in my Jeep to protect the Flat Tappet cam as the Kohler oil has around 3200 parts per million ZDDP but I think I will switch to the Lucas Synthetic Racing Oil at my next change now that I know that it has so much ZDDP in it and due to the availability of the Lucas products. The person I spoke with at Lucas assured me that the Lucas Racing Oil would hold up for my normal oil change interval of about 5000 to 6000 miles. Actually even the standard Lucas oil at 1265 parts per million would be more than enough to protect a Jeep 4.0 flat tappet cam.

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Unread 06-29-2011, 05:27 PM   #2
djb383
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At only 55lbs seat pressure, there's not much to worry about regarding tappet wear. It's not a race motor.
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Unread 06-29-2011, 05:38 PM   #3
wsar10
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the problem with using racing oils, or tractor oil for that matter is that you are only gaining in that particular mineral area I would think, what about the other additive package's ?

I run Rotella T5 in my 4.0,
it has the higher levels of ZDDP and moly, but it also has the detergents and seal conditioners.
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QUOTE=billzcat1;wsar10 is right on point on this oil thread - as usual. Anyone reading this would be well-served taking his advice.


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Unread 06-29-2011, 10:26 PM   #4
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Everything I have ever read about ZDDP content said that 1200 ppm was optimum. I have not seen any data that says more than that is better.
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Unread 06-30-2011, 07:49 AM   #5
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Thought I read somewhere that elavated levels of ZDDP are highly corrosive to engine internals. Again, at 55lbs seat pressure, tappet wear should be a non-issue as long as there's some kind of oil in it.
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Unread 06-30-2011, 08:09 AM   #6
wsar10
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Quote:
Originally Posted by djb383 View Post
Thought I read somewhere that elavated levels of ZDDP are highly corrosive to engine internals. Again, at 55lbs seat pressure, tappet wear should be a non-issue as long as there's some kind of oil in it.
Zinc and phosphorus do not cause corrosion, but exactly the opposite.
ZDDP was originally added to oil to prevent the corrosive characteristics of high sulfur fuels.
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QUOTE=billzcat1;wsar10 is right on point on this oil thread - as usual. Anyone reading this would be well-served taking his advice.


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Unread 06-30-2011, 08:19 AM   #7
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Quote:
Originally Posted by djb383 View Post
At only 55lbs seat pressure, there's not much to worry about regarding tappet wear. It's not a race motor.
x2. Yes the 4.0L has a flat tappet cam, but the weak valve springs don't insinuate the need for a high ZDDP oil. In fact, with a higher ZDDP oil you will ruin your cats before the engine shows increased wear.
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Unread 06-30-2011, 08:23 AM   #8
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thats ok I'll sleep better at night knowing my engine has more heavy metal protection vs. replace a 200 dollar cat.
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QUOTE=billzcat1;wsar10 is right on point on this oil thread - as usual. Anyone reading this would be well-served taking his advice.


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Unread 06-30-2011, 08:29 AM   #9
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Isn't it nice only having one of those SOBs? The 00-01 guys aren't so lucky.
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Unread 06-30-2011, 09:12 AM   #10
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Isn't it nice only having one of those SOBs? The 00-01 guys aren't so lucky.
yeah

Ill do whatever I can to to avoid killing my 3 cats faster and have to replace them..
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It's a 4.0 ... as long as there's something in the crank case that isn't coolant I'm sure it will still run forever.
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Unread 06-30-2011, 09:36 AM   #11
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Originally Posted by foggybottombob View Post
Everything I have ever read about ZDDP content said that 1200 ppm was optimum. I have not seen any data that says more than that is better.
thats what i have also read.
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Unread 06-30-2011, 09:36 AM   #12
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I have 3 aswell, in my WJ
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QUOTE=billzcat1;wsar10 is right on point on this oil thread - as usual. Anyone reading this would be well-served taking his advice.


-03 WJ laredo 4.0 120k a few minor mods
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Unread 06-30-2011, 09:44 AM   #13
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Amsoil also makes several oils with high levels of zinc and phosphorus. I have a 94 XJ and I have been using their products since I bought it new.
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Unread 06-30-2011, 09:48 AM   #14
wsar10
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AMSOIL is great don't misunderstand my comment to follow;

For half the price of AMSOIL you could run Rotella T5 for the same results,
you can check out the UOA's for both over a BITOG,
Rotella can be had at your local WM for 16 bucks a gallon versus waiting a week and paying 40.
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QUOTE=billzcat1;wsar10 is right on point on this oil thread - as usual. Anyone reading this would be well-served taking his advice.


-03 WJ laredo 4.0 120k a few minor mods
-93 XJ 5spd, 3" zone lift
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Unread 06-30-2011, 10:42 AM   #15
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It's a 4.0 ... as long as there's something in the crank case that isn't coolant I'm sure it will still run forever.
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