Any need for zdd plus with royal purple oil?

[jretrodude]

Using the royal purple 10w30 synthetic is there any need for the zdd plus additive when doing an oil change?

 

[theCATman]

You'd have to find out the ZDDP parts per million content for Royal Purple oil. But, in my opinion the additive is cheap insurance.

 

[kTrainHurricane]

i just did a Royal Purple oil change yesterday, and am waiting for the ZDDP to come in the mail from eBay ...idk if its necessary but i was gonna do it anyways

 

[Gary Wells]

An once of prevention is worth a pound of cure.

 

[kTrainHurricane]

i actually had a question on the subject (sorry to jack the thread!) - but if i FILL my car with oil [i think it was 5.5 qts], and then add in the ZDDP, wont it start to overflow? Or be soo full that i would risk blowing a gasket? Thanks...

 

[theCATman]

The Zddp additive is only 4 oz. So.... no.

 

[03FatBoy]

Interesting...
I just wrote to Royal Purple last week asking them the same question. Here is their reply:

"Yes - all of our motor oil products contain sufficient ZDDP for flat tappet cams.
For you engine, the RP 10W40 or RP 15W40 in our SAE Street oils would be a good choice - or the XPR 10W40 would be the ultimate.

The oils that you should stay away from - are the API SM rated oils in the lighter viscosity grades such as 0W20, 5W20, 0W30, 5W30, or 10W30 as these are limited to 800 ppm of ZDDP.
RP has not reduced any of our levels and continue to make the API SL in the lighter grades which contain 1100 ppm.
The 10W40 and 15 W40 contain 1300 ppm while the XPR is 1500 ppm."

 

[A2000RICH]

Interesting...
I just wrote to Royal Purple last week asking them the same question. Here is their reply:

"Yes - all of our motor oil products contain sufficient ZDDP for flat tappet cams.
For you engine, the RP 10W40 or RP 15W40 in our SAE Street oils would be a good choice - or the XPR 10W40 would be the ultimate.

The oils that you should stay away from - are the API SM rated oils in the lighter viscosity grades such as 0W20, 5W20, 0W30, 5W30, or 10W30 as these are limited to 800 ppm of ZDDP.
RP has not reduced any of our levels and continue to make the API SL in the lighter grades which contain 1100 ppm.
The 10W40 and 15 W40 contain 1300 ppm while the XPR is 1500 ppm."

some premium racing oils and many oil formulations from the pre OBDII days are in the 1800PPM range---------the real advantage to ZddPlus is the ability to add it to readily available (ie on sale at a discount) quality brand name oil and still have the equal of premium racing oils ----------ideally if you were really a perfectionist you would have your favorite oil tested and then use the dosage calculator from the ZddPlus website and use just what was necessary-------it doesn't take much if the oil already has 1100PPM and using too much is really not going to do you any good except waste money--------one thing that is never taken into account with the "long change interval oils" is that ZDDP breaks down with use and if you start out with 1100 PPM most studies show that after a couple thousand miles the effectiveness of the ZDDP is greatly diminished even though the Zinc and Phosp levels are still high----------and for initial break in 2000 PPM plus is not a bad idea--------i recently removed original fill oil from a couple new Corvette ZO6's and they had in excess of 2000 PPM--------just some things to consider...........RC

 

[kTrainHurricane]

so if i just did an oil change with RP 10w30 and got my bottle of ZDDP in the mail today, should i go ahead and put it in?

 

[wile87]

you got use it. i use the valvoline vr1 10/30 racing oil. already has high amounts of zddp.

 

[A2000RICH]

so if i just did an oil change with RP 10w30 and got my bottle of ZDDP in the mail today, should i go ahead and put it in?

if i was using RP i would use half the normal dose and add the rest after about 2500 to 3000 miles..........RC

 

[kTrainHurricane]

if i was using RP i would use half the normal dose and add the rest after about 2500 to 3000 miles..........RC

ah too late lol

 

[JOHNDEEREGN]

An once of prevention is worth a pound of cure.

amen

 

[novaderrik]

some premium racing oils and many oil formulations from the pre OBDII days are in the 1800PPM range---------the real advantage to ZddPlus is the ability to add it to readily available (ie on sale at a discount) quality brand name oil and still have the equal of premium racing oils ----------ideally if you were really a perfectionist you would have your favorite oil tested and then use the dosage calculator from the ZddPlus website and use just what was necessary-------it doesn't take much if the oil already has 1100PPM and using too much is really not going to do you any good except waste money--------one thing that is never taken into account with the "long change interval oils" is that ZDDP breaks down with use and if you start out with 1100 PPM most studies show that after a couple thousand miles the effectiveness of the ZDDP is greatly diminished even though the Zinc and Phosp levels are still high----------and for initial break in 2000 PPM plus is not a bad idea--------i recently removed original fill oil from a couple new Corvette ZO6's and they had in excess of 2000 PPM--------just some things to consider...........RC

does the EPA know that GM is selling cars with almost 3X the legal amount of these chemicals? dammit, the health of our children is at stake and polar bears might die.
and why would the Z06 need that much zinc and phosphorous if they don't have flat tappet cams?

 

[A2000RICH]

does the EPA know that GM is selling cars with almost 3X the legal amount of these chemicals? dammit, the health of our children is at stake and polar bears might die.
and why would the Z06 need that much zinc and phosphorous if they don't have flat tappet cams?

let me clear this up for you--------the EPA has no restrictions on the use of ZDDP-------there is no "legal limit"------the only mandate the EPA has is that the car companies have to warranty their "emission performance" for 150K miles seperate from the regular stated warranty--------its up to the car companies to decide how to acomplish that--------the car companies pressured the oil companies to lower ZDDP levels while designing their engines to meet warranty requirements with these lower levels and roller cams was a part ot that--------thats not really so difficult since most drivetrain (note this is seperate from emission components) warranties are in the 100K range and cars now last 2-300K easily--------those same engines that have been lasting 300K with high zddp oil formulations may now only last for 200K on the new low zddp formulas-------so what?????------they still get out of the warranty period safely and the car companies get to sell replacements sooner---------its a win for everyone but the consumer--------as for the corvettes we measured remember that was only "break in oil" and it was clear that off the shelf oil would be used for normal service...............RC

 

[buttonfly]

ok I have an easy yes or no question. I change my oil every 3-500 miles. Just because. Anyways I have been using just plain old valvoline 10w30 with a bottle of the new eos. I get it simply out of convienence. I work at a Chevrolet dealership so I can just grab it from work. So Am I safe??

 

[A2000RICH]

ok I have an easy yes or no question. I change my oil every 3-500 miles. Just because. Anyways I have been using just plain old valvoline 10w30 with a bottle of the new eos. I get it simply out of convienence. I work at a Chevrolet dealership so I can just grab it from work. So Am I safe??

shortly after the new EOS came out i had it tested-------it was identical in ZDDP concentration as the old stuff------- EOS is about one eighth the concentration of ZddPlus but the bottle is 4 times as big--------this means that one bottle of EOS is equal to a half bottle of ZddPlus--------since with your frequent oil changes you don't have to consider depletion with use, you should be just fine with the EOS till your boss catches you "grabbing" the bottles on the way out--------just kidding-------here's the math-------adding EOS to 5.5 qts of SM oil (800 PPM) will put the concentration in the 1250 PPM range------so will half a bottle of ZddPlus-----1250 PPM is the range of the Valvoline racing oils and should be very adequate unless you have a modified engine that turns high RPM's and or has very high pressure valve springs-------- an entire bottle of ZddPlus will put you at about 1900 PPM and this is in the range of the high priced racing oil formulations like Joe Gibbs and a few other super premium oils--------even though you obviously get it at a discount its hard to see how the EOS is a better deal---------list on ZddPlus is $9.95 so unless you get EOS for less than $5 it isn't such a good deal unless you live where you have to pay a lot for freight---------and one last thought---------i don't regularly test EOS to see if its changing and i haven't tested it for over a year---------don't have a clue why GM took it off the market just to change the part # but it appears they did----------you can count on the ZddPlus formula not changing.............RC

 

[buttonfly]

shortly after the new EOS came out i had it tested-------it was identical in ZDDP concentration as the old stuff------- EOS is about one eighth the concentration of ZddPlus but the bottle is 4 times as big--------this means that one bottle of EOS is equal to a half bottle of ZddPlus--------since with your frequent oil changes you don't have to consider depletion with use, you should be just fine with the EOS till your boss catches you "grabbing" the bottles on the way out--------just kidding-------here's the math-------adding EOS to 5.5 qts of SM oil (800 PPM) will put the concentration in the 1250 PPM range------so will half a bottle of ZddPlus-----1250 PPM is the range of the Valvoline racing oils and should be very adequate unless you have a modified engine that turns high RPM's and or has very high pressure valve springs-------- an entire bottle of ZddPlus will put you at about 1900 PPM and this is in the range of the high priced racing oil formulations like Joe Gibbs and a few other super premium oils--------even though you obviously get it at a discount its hard to see how the EOS is a better deal---------list on ZddPlus is $9.95 so unless you get EOS for less than $5 it isn't such a good deal unless you live where you have to pay a lot for freight---------and one last thought---------i don't regularly test EOS to see if its changing and i haven't tested it for over a year---------don't have a clue why GM took it off the market just to change the part # but it appears they did----------you can count on the ZddPlus formula not changing.............RC

Thank you RC! I know you know your stuff and I value your opinion. I probably will get some ZDDP, but it is nice to know I am safe at least doing what I am doing right now. Yes the occasional bottle of eos gets charged towards shop supplies, but I do buy a bottle here and there! Thanks a bunch. J

 

[V6-Sauce]

srry guys don't mean to hi-jack the thread...but i use synthetic mobil 10w 30 with zdd-plus....Is that o.k....

 

[liv4gnz]

what about lucas oil stabilizer does that have any in it?