how much zddp additive?

[Katavic918]

Hey all, I looked around and can't really find a specific answer to how much zddp I should add to my ldt465. I am using conventional rotella 1540 and zddplus brand additive in 4oz bottles. I am the type of person who tends to over do things. So far I have added 2 4oz bottles to a fresh oil change. I decided on 2 because of a post by Rustystud but he was using synthetic rotella. Any suggestions are appreciated. Thanks.

 

[rustystud]

Hey all, I looked around and can't really find a specific answer to how much zddp I should add to my ldt465. I am using conventional rotella 1540 and zddplus brand additive in 4oz bottles. I am the type of person who tends to over do things. So far I have added 2 4oz bottles to a fresh oil change. I decided on 2 because of a post by Rustystud but he was using synthetic rotella. Any suggestions are appreciated. Thanks.

I would stay with just the two bottles even for the conventional oil. Both have about the same amount of ZDDP in their oil so two 4oz bottles is fine. Since I wrote that I have found you can over do it on the ZDDP additive. So stick to the two bottles.

 

[Katavic918]

Thanks Rusty.

 

[davidb56]

there are 5 diesel 15/40wt oils that I found with 1200ppm ZDDP. Redline syn.has the best numbers, but is costly. Delo 400, Mobil Delvac, New Rotella, and .....Farm Rated 15/40 diesel oil.View attachment 1502.07261.pdf

 

[davidb56]

I tried to post a study on ZDDP...I failed. the condensed version is 1200ppm-1800 is good, over 1800 is not. most oils have around 800-900 because the goober mint says it pollutes. Diesels and race cars need more, especially during break-in. We ran Delo in our diesel and natural gas engines.

 

[davidb56]

Click on the black box...the link works. I assumed it wasn't there because the pic is blacked out.

 

[CMPPhil]

Hi

Download of study works fine, thanks.

Cheers Phil

 

[Floridianson]

I tried to post a study on ZDDP...I failed. the condensed version is 1200ppm-1800 is good, over 1800 is not. most oils have around 800-900 because the goober mint says it pollutes. Diesels and race cars need more, especially during break-in. We ran Delo in our diesel and natural gas engines.

Yep my last Blackstone came back at 1242 and Rotella no additives. I don't ever add any but as said Rotella or Delo and no worries and always good reports. Always best to have it tested if you think your oil can not match up to these. Lets see some more Blackstone reports from other OP's if you got them.

 

[rustystud]

I tried to post a study on ZDDP...I failed. the condensed version is 1200ppm-1800 is good, over 1800 is not. most oils have around 800-900 because the goober mint says it pollutes. Diesels and race cars need more, especially during break-in. We ran Delo in our diesel and natural gas engines.

That pretty much matches up with what I've been reading. Though the reports I've read say 2000 PPM is the max for ZDDP for a well broken in engine. Now if your breaking in a "rebuilt" engine they say to use up to 5000 PPM for the first 2000 miles. Cam and tappet wear is the biggest issue.

 

[Floridianson]

Really no one else sends there oil out to Blackstone with all the worry. Seems like it would also be nice to know about the rest of your engine too. I do all the trucks I drive on a regular bases.https://blog.amsoil.com/do-older-vehicles-need-high-zinc-motor-oil/