Can anyone tell me what the additive package for Mobil DTE 797 Turbine oil is. My oil analysis shows there is nothing as for as additives. My Exxon Mobil rep. tells me theirs not much of an additive but he cant tell me what not much is. Not much is still more than nothing.

This probably has nothing new but here is Mobil's info on the DTE 790 series:

http://www.mobil.com/USA-English/Lubes/PDS/GLXXENINDMOMobilDTE790Series.asp

Hello,

I check my database, I have not come across this DTE yet. Unless someone else has tested this formulation, your best bet would be to send a new sample for spectrographic analysis since oil companies will not give this info out

A quote from Pete's link to Mobil DTE:

"Mobil DTE 790 Series oils are based on proprietary, very high quality, hydrotreated base stocks and selected additives"

One thing to be aware of is that from batch to batch, the additive amounts will vary.

Regards,

-Kris Sonne

We have this in several of our machines. I haven't figured out why we chose to use DTE797 in certain applications (horizontal chiller compressor motor sleeve bearings and vertical motor upper spherical roller bearing) and DTE light in other applications when both have the same viscosity (VG32). I do have some oil analysis reports on DTE797 including metal concentration by ICP analysis, but I think the original poster has this info as well.

Thanks Pete I had already looked on the web site. It does not tell me what the additives are only that it has some. The oil may be fine but if the additives are depleted I need to know. I am more concered with the high speed gear units than the turbines. What do you think. Thanks Thomas

Hello,

Pete: Well, if you have the breakdown of the elements via ICP of a new DTE you should be able to compare it to a used sample or am I missing something? I'm a big fan of comparison.

There are other methods to determine antioxidant levels as well. [PLUG] One of which is the RULER analyser (which my company distributes), which measures the antioxidants through voltammetry [END PLUG].

Regards,

-Kris Sonne

I've tested new and used DTE-797 and the only additive that shows is a bit of phosphorus, about 5-10PPM. The rest of the slate comes up clean. I look at oxidation, water, particle count and acid number to track condition.
rgf

Performing an ICP or RDE will only confirm what the asddditive packeage in a given lubricant is. While elements may be present, it does not assure that they are active. To insure that the additves are not "depleted" yo will need to run an FTIR and compare the present scan to a scan of new oil.

Thomas,

It sounds like a good base oil with Small amount
of Additives like Rust,Foam Inhibitor.You need to monitor regularly through wear analysis,
Viscosity,Particle Count,Water,TAN.

TTT, FTIR Analysis tracks only Organic Additives
It seems DTE series doesn't have organic type
ZDDP,Dispersant,Detergent etc...

Regards

Bala.

While we're talking about DTE797... does anyone know the difference betweed DTE979 and DTE Light.

Both are VG32 non-synthetic with R&O additives and not much else.

At our plant there was a big lub consolidation program a few years back. The guy who did it has left our plant (although I think he reads this board sometimes). I'm wondering why DTE Light was selected for some applications and DTE797 for other applications.

We have the same situation although our consolidation efforts ended up using DTE-797 in quite a few applications where I believe DTE-Light or Medium would have been acceptable. Like you I wasn’t in on the decision process so until proven otherwise I live with the results.
So far so good.
rgf