Just got my UOA back on this vehicle. VERY happy with the results! Im not sure how to post their report on here so I will type it out. Duramax LBZ. Oil was rotella 15w40 CJ-4. MIles on truck 61,339. MIles on oil were 9,054 miles in about 5 months. One quart of makeup oil added halfway thru run. No additives added to oil. I did run fuel injector additives in the fuel though. I also noted that this truck is "tuned" being that I added more power to it, and they mentioned if I would not have mentioned that to them, that the could not even tell. Oil filter was a bosch "distance" plus with two "filtermags" installed. They noted that they found a "trace" of fuel but it was no concern. TBN read strong at 7.2! EGR system is disabled on this truck I wanted to add also. I tow hard with this vehicle (13,000 pound trailer) in summer months....and I can now be rest assured that dino HDEO used for reasonable intervals are the way to go! HOWEVER.... just to be different..for my next run I will be trying out the rotella T6 synthetic for a longer interval. I wanted to run this batch at least until the "change oil light" message came on...but I got skeered only because I added the computer tuner to this truck and was worried about that taking it's toll even more on this oil with possible fuel dilution. This obviously was not an issue and blackstone recommended to run this oil next time to 11,000 miles and then UOA.
Here are the rest of the numbers...
Aluminum 2
Chromium 1
Iron 18
Copper 2
Lead 3
Tin 0
Molybdenum 5
Silver 1
Titanium 0
Potassium 7
Boron 27
Silicon 8
Sodium 3
Calcium 2477
Magnesium 33
Phosphorus 1120
Zinc 1237
Barium 0
SUS Viscosity @ 210 f 77.4
cst viscosity @ 100 c 14.86
Flashpoint F 420
Fuel % TRACE
Atifreeze % 0.0
Water % 0.0
Insolubles % 0.2
TBN 7.2
Here are the rest of the numbers...
Aluminum 2
Chromium 1
Iron 18
Copper 2
Lead 3
Tin 0
Molybdenum 5
Silver 1
Titanium 0
Potassium 7
Boron 27
Silicon 8
Sodium 3
Calcium 2477
Magnesium 33
Phosphorus 1120
Zinc 1237
Barium 0
SUS Viscosity @ 210 f 77.4
cst viscosity @ 100 c 14.86
Flashpoint F 420
Fuel % TRACE
Atifreeze % 0.0
Water % 0.0
Insolubles % 0.2
TBN 7.2