dnewton3
Staff member
UOA analysis
2006 LBZ Duramax
20k miles total on vehicle; approx. 50% heavy towing at highway speeds
6k miles and 1 year on OCI; Rotella 10w-30 CJ-4; Wix/Napa 57202 filter
All readings zero if not noted
1 quart make up oil around 5k miles. (didn't need it; just a top off)
TBN not tested as oil dumped at 6k miles (1 year interval).
This is the first UOA on vehicle.
Attribute.......Unit reading...........Univ Avg
Al..............3.......................9
Fe..............10......................12
Cu..............5.......................10
Pb..............2.......................3
Tn..............1.......................1
MOLYB...........2.......................29
Potas...........13......................3
Boron...........24.......................54
Silicon.........11.......................9
Calcium.........2358...................2661
Magnes..........10.....................229
Phos............1001..................1090
Zn...............1201......................1290
[email protected] 59-65
[email protected] 9.9-11.9
Flashpoint............425
No fuel
No water
No coolant
Insolubles @ .3%
Blackstone Comments:
“The Isuzu 6.6L is one of the best wearing diesel engines that we see samples from and yours is no exception. You noted that about half of the miles on this fill were put on while towing a heavy load but if you hadn’t told us that, we never would have guessed. Wear looks great here and the only things that kept this from being a perfect report was the high viscosity. It read in the 15w-40 range, which is fine for this type engine. We found no harmful contaminants in the sample. At 20,000 smiles, we have no problems to report.”
I have no idea how the vis go so high, except that maybe (because the engine is 100% stock and uses EGR) the soot may have thickened it up a bit? But if so, it didn’t seem to hurt the insolubles at all, nor cause wear. Vis can climb when the fluid is greatly heated (oxidation) but, again, didn’t seem to hurt anything at all.
I tow heavy 50% of the total vehicle use. In summer heat, pulling travel trailer; it's all I do with the truck. (I'm not aggressive, but I certainly don't baby it), and the other 50% of vehicle use is a mix of driving styles, primarily in winter for 4x4 driving.
I am very pleased with the CJ-4 Rotella 10w-30. People often don’t consider the lighter grades, but certainly this one held its own. For $8.99/gallon last fall when I bought it, I cannot complain.
Just filled with Delvac 1300 15w-40. Why? Right now, you can score it for $12.99 for TWO gallons! (BOGOF). Not that I expect it will do much “better” than the results my Rotella just posted.
I am really becoming acutely aware that modern diesel engines and CJ-4 dino fluids are just hard to beat, no matter the brand of engine or lube.
2006 LBZ Duramax
20k miles total on vehicle; approx. 50% heavy towing at highway speeds
6k miles and 1 year on OCI; Rotella 10w-30 CJ-4; Wix/Napa 57202 filter
All readings zero if not noted
1 quart make up oil around 5k miles. (didn't need it; just a top off)
TBN not tested as oil dumped at 6k miles (1 year interval).
This is the first UOA on vehicle.
Attribute.......Unit reading...........Univ Avg
Al..............3.......................9
Fe..............10......................12
Cu..............5.......................10
Pb..............2.......................3
Tn..............1.......................1
MOLYB...........2.......................29
Potas...........13......................3
Boron...........24.......................54
Silicon.........11.......................9
Calcium.........2358...................2661
Magnes..........10.....................229
Phos............1001..................1090
Zn...............1201......................1290
[email protected] 59-65
[email protected] 9.9-11.9
Flashpoint............425
No fuel
No water
No coolant
Insolubles @ .3%
Blackstone Comments:
“The Isuzu 6.6L is one of the best wearing diesel engines that we see samples from and yours is no exception. You noted that about half of the miles on this fill were put on while towing a heavy load but if you hadn’t told us that, we never would have guessed. Wear looks great here and the only things that kept this from being a perfect report was the high viscosity. It read in the 15w-40 range, which is fine for this type engine. We found no harmful contaminants in the sample. At 20,000 smiles, we have no problems to report.”
I have no idea how the vis go so high, except that maybe (because the engine is 100% stock and uses EGR) the soot may have thickened it up a bit? But if so, it didn’t seem to hurt the insolubles at all, nor cause wear. Vis can climb when the fluid is greatly heated (oxidation) but, again, didn’t seem to hurt anything at all.
I tow heavy 50% of the total vehicle use. In summer heat, pulling travel trailer; it's all I do with the truck. (I'm not aggressive, but I certainly don't baby it), and the other 50% of vehicle use is a mix of driving styles, primarily in winter for 4x4 driving.
I am very pleased with the CJ-4 Rotella 10w-30. People often don’t consider the lighter grades, but certainly this one held its own. For $8.99/gallon last fall when I bought it, I cannot complain.
Just filled with Delvac 1300 15w-40. Why? Right now, you can score it for $12.99 for TWO gallons! (BOGOF). Not that I expect it will do much “better” than the results my Rotella just posted.
I am really becoming acutely aware that modern diesel engines and CJ-4 dino fluids are just hard to beat, no matter the brand of engine or lube.
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