ykf7b0

Has anyone tried Lucas Break In Oil 10631? Their numbers for zinc and phosphorus are way above all others.

greggome

Any opinions on Rotella oil for flat tappet motors? Shell claims it still has 1200 ppm ZDDP in its T4 15w- 40 & 10w-30.

LenWoodruff

It was recommended by my engine builder and I have a friend with a 66 Vette with L79 327 that has been running it for 10 years.

I would like to know what the difference is in this oil VS regular oils other than the ZDDP

billla

Answered in the original post; the detergent package for diesels is *very* different than those for gasoline engines.

Why use a diesel oil when there are so many good choices specifically designed for our engines?

greggome

Thanks. I have heard in the past that folks were using Rotella for the elevated ZDDP levels and since Rotella is half the price of most of the other oils with high ZDDP I was wondering if it was appropriate to use and save some $. These specialty, racing and synth olis have gotten so expensive lately. Of course if its not good to run in my car I will avoid it for sure and spend the extra . Also Mobil suggested their turbo diesel truck oil which has phos of 1100 and zinc 1300 but is not cheap as Rotella. Thanks for the opinion.

NRAROX

billa, I don't think this link to AMSOIL works any more. Am I wrong? I cannot find anywhere in any of their technical documents where they specifically state their ZDDP levels. It's always scary when numbers disappear.

AMSOIL says that "ZDDP levels in Z-ROD Synthetic Motor Oil exceed the limits of API SM and newer specifications.", but I cannot find where the API SM spec contained in the API standards indicates a ZDDP requirement.


(Synthetic) AMSOIL Z-ROD Synthetic Motor Oil
Links provided by Corvette Forum Vendor C66 RacingLLC (PM 'Subdriver')

Grades: 10w30(ZRT) , 20w50(ZRF)

Claim: "AMSOIL Z-ROD Synthetic Motor Oil is formulated with high levels of ZDDP to protect flat-tappet cams, lifters, rockers and other areas susceptible to wear. Its high-zinc, high-phosphorus formulation provides the extra wear protection these critical splash-lubricated components require."

Verification: ~ 1320 PPM: http://www.amsoil.com/techservicesbu...t%20Tappet.pdf

LenWoodruff

Can I ask where you got this info?

I couldn't find any 10W-30 T4 so I used the T5 Blended.

I would like to know the ZDDP content for the T5

LenWoodruff

I did find these T5 10w-30 Rotella Test Results dated 2014. This is Cj4/SM rated which is what is on my oil bottle.

http://www.pqiamerica.com/June%20201...llatT51030.htm

billla

Thanks for letting me know - I'll follow-up with our on-forum distributor guy!

greggome

The information came to me via email from Shell technical support it read as follows "The Shell Rotella T4 15w-40 and 10w-30 still have 1200ppm of ZDDP and are suitable for use in a gasoline engine.

Sincerely,
Don
Shell Technical Information
1-800-237-8645"

Hope that helps

LenWoodruff

Thanks for the info. I will give them a call tomorrow,

LenWoodruff

Thanks Don for the contact info.

I called the Shell Tech line specifically about the Shell Rotella T5 10w-30 synthetic blend.

If the package says CJ4 then it has 1300 PPM of zinc and 1100 Phosphorus.

They are coming out with a new blend that is CK4 and it has 1200 PPM of zinc and still around 1100 ppm of Prosperous.

Mark_Milner

One thing that would be helpful is since talk about flat tappet protection depends somewhat on spring pressures, maybe including some spring pressures and how much zinc would be a good idea.

Something like:

xxx lb - light pressure, aaaa ppm ZDDP needed

yyy lb - moderate pressure, bbbb ppm ZDDP needed

zzz lb - heavy pressure, cccc ppm ZDDP needed

Yes, ti says we need at least 1000 ppm, but then it is mentioned in several locations you can get away with less with light pressures and slow easy ramps, but need more with heavy pressures and aggressive ramps. But what are we really looking at on pressures ramps?

billla

Amsoil links updated thanks to NRAROX for catching it, and C66 Racing for providing updated information.

billla

I don't know that anyone has that verified information. We could say generally that for lift over .550 and/or turning over 6K RPM or so you should probably be using a racing-class oil with very high ZDDP...although if you're building at that lift level a roller cam is a far better choice.

The comment regarding mild cams was more to point out why some folks note to have used low-ZDDP oils with no issues. As an example, many Chevy lo po performance engines use the venerable GM "390" cam with .390 lift and a very mild ramp and extremely low spring pressure...especially for high mileage engines that rarely see more than 4,000 RPM.

mullvamp

I used synthetic oil in my 502 flat tapped cam gen 5 440 hp since ca.22 years (55.000 kilometers) without any problems. The engine was new.Pressure ok., consumption ok, no leaking.
The make is : Castrol Edge 10/60 full synth.
I am wondering why many do have problems with oils like this.
Regards from Germany, Kalle

68post

The oils produced to sell in your market are formulated with different chemistries ,(by law), than the ones sold here, so it very well may be an "apples to oranges" comparison within the same product.

I don't know that we even have an Edge 10w-60 here !

billla

It's covered in the first post, but the problem overall seems to be old, hard seals that are maybe getting a little sealing help from gunk and varnish. Synthetics are more solvent, and dissolve those deposits and expose bad seals - nearly always the front main seal.

Newer engines with modern seals have zero issues.

63mako

https://globalmotortrend.com/synthet...ventional-car/

corvetero

That's the oil used by the BMW M3 E46, I'm pretty sure that can be found in USA