ZDDP Oil Additives

[priapism]

I have three bottles of the stuff sitting in my garage and haven't touched 'em.

[ForcedFirebird]

Rislone

[TobyB]

You only have to wipe one cam to get jumpy about this-

it makes a MESS out of what used to be a nice $6000 race motor...

and yes, it comes up a lot.

t

[stamar]

isnt the standard stp additiver zddp?

that can be real cheap

i mean it feels half retarded to use full synthetic and the 1.50 oil additive. but i think thats what the data says.

believe it or not zddp means cheap the reason good oil doesnt have it is they use better stuff.

[TobyB]

believe it or not zddp means cheap the reason good oil doesnt have it is they use better stuff.

not.

zddp is used to reduce the effects of sliding friction, specifically anymore just for cams.
And most modern engines have roller rockers, so they don't need much of it.
M20s have sliders. And do, under certain conditions.

The reason that levels keep going down is that it shortens the life of a catalytic converter.

t

[ForcedFirebird]

not.

zddp is used to reduce the effects of sliding friction, specifically anymore just for cams.
And most modern engines have roller rockers, so they don't need much of it.
M20s have sliders. And do, under certain conditions.

The reason that levels keep going down is that it shortens the life of a catalytic converter.

t

Yup, it was eliminated for emissions, just like the tolerances on newer motors are tighter, requiring thinner oils. A lot of mfgr's use oil as thin as 0w-20.

[nando]

isnt the standard stp additiver zddp?

that can be real cheap

i mean it feels half retarded to use full synthetic and the 1.50 oil additive. but i think thats what the data says.

believe it or not zddp means cheap the reason good oil doesnt have it is they use better stuff.

huh? where did you pull this nonsense from?

the reason they don't have as much is because the EPA limits its use to protect emissions equipment. ZDDP is still the most effective anti-wear additive. Don't expect a 2012 engine to last for 200,000 miles with no wear, though..

[dnguyen1963]

huh? where did you pull this nonsense from?

the reason they don't have as much is because the EPA limits its use to protect emissions equipment. ZDDP is still the most effective anti-wear additive. Don't expect a 2012 engine to last for 200,000 miles with no wear, though..

Yes, degradation products from ZDDP bind palladium metal in the cat and eventually kill off the cat converter; thus the name "poison".

[priapism]

You only have to wipe one cam to get jumpy about this-

it makes a MESS out of what used to be a nice $6000 race motor...

and yes, it comes up a lot.

t

How so?

[nando]

Yes, degradation products from ZDDP bind palladium metal in the cat and eventually kill off the cat converter; thus the name "poison".

well, according to the EPA - it's up for debate whether that's actually the cause. it's not set in stone that ZDDP damages cats. Look how long E30 cats last, and they used ZDDP for decades.

[FLG]

Guys we covered this in detail over on the charger forums

http://www.dodgecharger.com/forum/index.php/topic,46015.0.html

Some guys even had testing done.

The conclusion is any hi-po oil (amsoil, joe Gibbs..etc) have adequate amounts of zinc.

Rotella no longer has a lot of zinc in there new (well a bit old now) formula.

If youn want to use an off the shelf oil you could buy zinc additive from any speed shop or your local GM dealership.

Sent from my Galaxy Nexus using Tapatalk

[chadthestampede]

Good read on oil:

http://www.r3vlimited.com/board/showthread.php?t=215720

[TrentW]

This.

I use additive with conventional/low zinc synthetics, none with Mobil1 or Rotella. If a customer is partial to a specific oil, then I add the ZDDP since in the end, I am responsible for their vehicle. More ZDDP isn't better per say.

In my own car, I run GTX and ZDDP, just because I am old school and always have been partial to GTX (plus being a cheap at times and will buy in bulk when on sale, lol).

I'm in a quandry about oil right now. I too was using 20w50 GTX but found out about low ZDDP levels and that Castrol won't even publish their specs so switched to Valvoline VR-1 20w50. Now I find out that since it's a racing oil, there is no detergent in it and also isn't recommended for vehicles with a cat.

I'm thinking of adding the Rislone ZDDP and switching back to GTX, but what is the proper amount needed?

Or, what about Kendall GT-1? Supposedly has higher ZDDP rating-1600?

[ForcedFirebird]

The additive will say on the bottle, usually one bottle per 5qt. Just run Mobil1 15-50, it's cheaper than conventional and the additive. We have switched to M1 at the shop.

[Sirotto]

Just run the VR-1 or the GTX + Rislone or mobile 1. Your cat will be just fine as stated before. It has been seeing ZDDP for years on years now.

The now obsolete Kendall with the the old, I believe was SG rated, and have tons of ZDDP. The new SL rated is no where near what is used to be. When the EPA banished the SG rating the local parts stores could not sell it anymore so i went all over town and bought over 500 bottles for .15 each. That is teh only reason I still have some.

You guys should just listen to John (forcedfirebird). All the reading you can do on the interwebs will not compete with his hands on actual experience. Done.