'94 Grand Am 4T60-E NEO ATF 15618 OCI 192618 total

[benjamming]

Code:
ATF used NEO ATF

Sample Date 16-Feb-2009

Miles on oil 15,618

Miles on car 192,318

Make-up oil None

Filter: AC-Delco

% tested fluid: 79%

Lab: Dyson



Wear Metals:

Iron: 192

Copper: 63

Tin: 0

Lead: 23

Chromium: 0

Nickel: 0

Aluminum: 8

Titanium: 0

Silver: 0



Additive Metals:

Calcium: 462

Magnesium: 7

Zinc: 37

Phosphorus: 281

Barium: 1

Molybdenum: 0

Antimony: 0



Contaminant Metals:

Silicon: 8

Sodium: 17

Boron: 188

Potassium: 0

Vanadium: 0



Physical & Other Tests:

Viscosity 40C: 23.5

Viscosity 100C: 4.9

TAN: 0.73

Flashpoint: 325

Oxidation: 57

Nitration: 5

KF Water: 728

TBN: 0.6

Fuel: 1.25

Soot: 6.54

Glycol: 0

VI: 136

Sulfate: 58


This is the 4-speed auto with the infamous 3.1L V6. The transmission cooler lines were leaking so I just dropped the pan & changed it along with new lines.

Neo is a diester based oil that starts out thin. I am considering refilling with Royal Purple Max-ATF. It starts out at 7.5 cSt but will it shear badly? I may run only 15-20k miles again & do a UOA. I can't imagine it being this low in that time frame.

Current filter:

Previous OCI filter (similar UOA results):

 

[Steve S]

I would run the NEO again the filter looks good .

 

[astraelraen]

You've gotta be making up that 2nd picture... how do you still have a transmission left, all your pieces are in the filter?

 

[benjamming]

No fakes here. The car still shifts well. Original thread with pictures

Steve,

NEO is just too thin IMHO for this ol' car. I mainly tried it out of curiosity b/c I didn't have the guts to try it on my Honda AT first. But, I agree that it is a good (ahem pricey) fluid.

 

[pbm]

I assume the debris in the filter is gasket material? The fluid itself looks nice and "cherry red" still. I'd think you could go longer on that fluid. I went 60K on Mobil 1 in my 4T65-E and it was still red and shifting nice. I plan on doing 75K on the current fill of Mobil 1. I also add Lubegard red.

 

[benjamming]

Probably some of it is, but some is magnetic.

 

[benjamming]

Originally Posted By: benjamming
Neo is a diester based oil that starts out thin.


It appears that may not really be the case with the physical tests.

Typical Characteristics:
Density at 15°C, g/mL: 0.853
Viscosity at 100°C, mm2/s: 7.7
Brookfield viscosity at -40°, cP: 11,500
Flash Point (PMC), °C, min: 180
Phosphorous, % weight: 0.022

This really makes the final viscosity result disheartening & all the more reason to change fluid & move on. That is a lot of shearing.