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By oldcarmark - 14 Years Ago
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Looking around the internet there seems to be confusion about how much Zddp is this oil.Does it still have sufficient additives for our motors or should I be buying the Zddp additive in cans?Also seems to be a question as to what is the correct PPM for gas motors as opposed to diesel.Apparently too much is just as bad as too little.
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By DANIEL TINDER - 14 Years Ago
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Mark,
As far as I know, it still has not been proven/settled whether the aftermarket ZDDP additives will even mix properly. I'd stay with an official/proven oil formulation just to be safe.
While the newer Rotella does have less zinc (I still have a dozen gals. of the older formula put away), it may still be adequate for tappets/cams that are well broken-in, but might possibly be dicey for a fresh motor with stiffer/HiPo springs. Also, since the higher detergency of diesel oil may eventually strip off some of the built up protective zinc layers laid down before ZDDP was reduced, you might consider (like me) rotating occasionally with a ultra high-zinc racing oil to replenish protection.
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By Rono - 14 Years Ago
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There is an article by Joseph Pullen in the latest issue of YBM where he indicates you can use Amsoil 10W-40 in our Y-Blocks because they have zinc. He is correct. I use the Amsoil 10W-40 "Premium Protection Motor Oil" in my '56 Customline. The product is listed as having "a high zinc formula and excellent for flat tappets, high performance, heavy duty and high milage applications" Rono
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By oldcarmark - 14 Years Ago
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Thats good to know.Up here north of the border not sold here.The Rotella-T is available at Walmart in 20 litre jugs which is good for about 3 oil changes.Thats what I am using which is why I am asking about the Zddp.
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By Rono - 14 Years Ago
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Oldcarmark; You can order Amsoil products factory direct. I can send you a retail catalog if you want. If you're interested, send me a PM. Rono
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By paul2748 - 14 Years Ago
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The latest formulation of Shell Rotella T 15/40 has 1100 ppm of ZDDP. This should be ok for any basically stock engine. In addition, any 10/40, 20/50 dino oil has enough ZDDP. If breaking in a new engine, I would add a supplement such as GM (gasp) EOS or any of the other supplements.
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By oldcarmark - 14 Years Ago
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Thanks Paul.I found Daniels input interesting.About whether or not the Zddp additives actually do mix with the oil.With all the various suppliers selling the additives it would be nice to know if they are actually effective.Also as I mentioned before apparently you can have too much Zddp in the oil.The diesel formulated oils have a higher Zddp content than the gas formulated oils.I thought the Rotella-T was a diesel oil yet the PPM of Zddp is actually quite low.
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By DANIEL TINDER - 14 Years Ago
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I believe the GM additive was designed largely for the brief, initial break-in run. Likely the others would suffice in a pinch for that also?
New diesels with cat. converters unable to use higher zinc formulas, but I suspect their heavier loading of engine components compared to high RPM/roller cam gas engines will still likely keep that oil to a higher zinc content. Again, higher detergency could possibly be problematic though if not addressed, but previously mentioned rotation might eventually clear the sludge from an old engine?
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By Eddie Paskey - 14 Years Ago
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Hey Guys;; I use shell, but I put in a bottle ZDDP just to be save. Tooo much invested to take a chance. Have Fun God Bless and thanks to all for this great site!!!! Eddie
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By iL Rev - 14 Years Ago
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Valvoline VR1 racing oil is available at your local parts store, is priced like plain ole cheap oil and has "old fashioned Zinc additives" in it. I run it religiously in my 60 292 and does just fine.
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By 46yblock - 14 Years Ago
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iL Rev (8/6/2011)
Valvoline VR1 racing oil is available at your local parts store, is priced like plain ole cheap oil and has "old fashioned Zinc additives" in it. I run it religiously in my 60 292 and does just fine. So do I, in 10/30 version VR1.
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By Missouri Mike - 14 Years Ago
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I recently changed oil in my 87 IH truck with 6.9 using Rotella. The last gallon I added said low emission new improved blah blah blah. To me this all means there is less ZDDP in it which my older diesel needs too. In my hydraulic lifter engines I started using Comp Cams ZDDP additive which states it's not break in additive or racing additive but engineered to be run with regular oil and changed at normal oil change intervals. I'm counting on Comp to have engineered a product that will perform as they still sell a bunch of non roller cams. I spoke one day with a Valvoline engineer and you are absolutely correct the racing oil you mentioned is their only product with ZDDP. I've heard the Amsoil is good stuff but what is the cost? Can anyone give me an idea of case or gallon price? I have 5 trucks and cars that need the stuff so unfortunately cost is a factor. Thanks Missouri Mike
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By paul2748 - 14 Years Ago
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Ive never seen a subject beaten to death as this one. Apparently no one reads the other entries on this subject.
No other than Ted Eaton, YBlock engine builder deluxe, recommends any oil 10/40 or higher as perfectly safe for YBlocks. Current Rotella and 10/40, 20/50 dino oils have at least twice as much ZDDP as oils in the 60's.
Another YBlock restorer and engine builder of 55-57 TBirds says the same thing. He commissioned a study on this.
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By Missouri Mike - 14 Years Ago
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Would have responded sooner but a storm knocked out phones for several days. Signed onto this forum because everyone seemed so decent and I didn't ever see anyone jumping on someone's ass for thier opinion, till now. Plus, I don't care for people who take shots from afar. I've run diesel for 22 years, pick ups to class 5 trucks, three diesel cars and at least three tractors. I've run Pennzoil, Ursa and Rotella oils. I've also run diesel oil in my 460, 428, two 360s, and y blocks. In my two current diesel cars the manufacturer is adamant about not using the "older" style oils. If you follow what is happening in the diesel world you will see the continued use of the words "cleaner" and "less build up". It's being used about engines, fuel and oil. The big thing to make diesel oil cleaner, take out as much ZDDP as possible just like the cars. I don't know when it will happen, how much will be removed but it will happen because the government wants it and so do the greenies. Mike Johnson
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