Here's my final UOA on Mobil 1 TDT, with the particulars listed below.
Lab used: Predictive Maintenance Services/AV Lube
Car: 2004 Jetta GL (PD engine)
Mileage on car at time of sample: 148,157
Miles on sample: 11,608
Oil: Mobil 1 TDT (CI-4+)
Make-up oil added: 500ml
Fuel used: BP#2 Diesel, plus 4 ozs Stanadyne Performance Formula added with each fill up.
Iron: 30
Chromium: 1
Lead: 1
Copper: 3
Tin: 0
Aluminum: 6
Nickel: 1
Silver: 0
Silicon: 4
Boron: 43
Sodium: 4
Potassium: 4
Magnesium: 416
Calcium: 2460
Phosphorus: 1518
Zinc: 1397
Molybdenum: 0
Fuel: A
Water: Glycol: N
Viscosity @ 100c: 14.7
TBN: 10.0
Soot: 0.2
Oxidation: 15
Nitration: 10
Lab's comments: "Wear and contamination levels appear normal. No corrrective action indicated by tests performed. Continue normal PM and sample interval."
My comments: Another outstanding UOA with this oil. Obviously, I could have left it in much longer. Soot, sodium, potassium, and lead have returned to normal since the EGR/boost problem was corrected, and the oil stayed in grade. As always, the oil filter was cut apart and checked for metal particles. None were found. A visual inspection of the cam/followers/rollers shows nothing amiss.
I have switched to Delvac 1 ESP, and will continue my "experiment" with that oil.
I welcome your comments.
Lab used: Predictive Maintenance Services/AV Lube
Car: 2004 Jetta GL (PD engine)
Mileage on car at time of sample: 148,157
Miles on sample: 11,608
Oil: Mobil 1 TDT (CI-4+)
Make-up oil added: 500ml
Fuel used: BP#2 Diesel, plus 4 ozs Stanadyne Performance Formula added with each fill up.
Iron: 30
Chromium: 1
Lead: 1
Copper: 3
Tin: 0
Aluminum: 6
Nickel: 1
Silver: 0
Silicon: 4
Boron: 43
Sodium: 4
Potassium: 4
Magnesium: 416
Calcium: 2460
Phosphorus: 1518
Zinc: 1397
Molybdenum: 0
Fuel: A
Water: Glycol: N
Viscosity @ 100c: 14.7
TBN: 10.0
Soot: 0.2
Oxidation: 15
Nitration: 10
Lab's comments: "Wear and contamination levels appear normal. No corrrective action indicated by tests performed. Continue normal PM and sample interval."
My comments: Another outstanding UOA with this oil. Obviously, I could have left it in much longer. Soot, sodium, potassium, and lead have returned to normal since the EGR/boost problem was corrected, and the oil stayed in grade. As always, the oil filter was cut apart and checked for metal particles. None were found. A visual inspection of the cam/followers/rollers shows nothing amiss.
I have switched to Delvac 1 ESP, and will continue my "experiment" with that oil.
I welcome your comments.