I am looking at buying this vehicle, and did an oil analysis on it. Herewith the results. The vehicle did have an injector leaking / cracked head problem before, but this has been corrected (new head, new injectors, seals etc.) and oil has been replaced 3800 miles ago.
The only worrying bit is the 2 % fuel dilution in this sample, but I don't know if that is a lot, and whether there was a lot of short trips done with the vehicle before I took the sample (I did drive it on the highway for 30 mins before the sample). I suppose there could still have been some trace amounts of diesel left in the system even after replacing the oil?
The question: Buy / not buy?
Diagnosis by Wearcheck:
"Wear rates are normal and the sample provided appears free from
unacceptable contamination or degradation. A microscopic particle
examination of particles filtered from the oil revealed no abnormal
contamination. Slight fuel dilution evident."
** Wear metals
Iron 26
Chromium 4
Nickel 2
Molybdenum 3
Aluminium 10
Copper 11
Tin 0
Lead 1
PQ Index 12
** Contaminants
Silicon 21
Sodium 5
Soot value 0
Soot % 0.0
Oxidation 12
Sulphate 18
Nitrates 7
Fuel % 5
Water % not detected
** Additives & Lubricant condition
Magnesium 15
Calcium 2863
Zinc 1166
Phosphorous 1024
Boron 2
Sulphur 11630
TBN 9.9
** Viscosity
cSt 40 degrees Celcius 84.3
cSt 100 degrees Celcius 12.5
The only worrying bit is the 2 % fuel dilution in this sample, but I don't know if that is a lot, and whether there was a lot of short trips done with the vehicle before I took the sample (I did drive it on the highway for 30 mins before the sample). I suppose there could still have been some trace amounts of diesel left in the system even after replacing the oil?
The question: Buy / not buy?
Diagnosis by Wearcheck:
"Wear rates are normal and the sample provided appears free from
unacceptable contamination or degradation. A microscopic particle
examination of particles filtered from the oil revealed no abnormal
contamination. Slight fuel dilution evident."
** Wear metals
Iron 26
Chromium 4
Nickel 2
Molybdenum 3
Aluminium 10
Copper 11
Tin 0
Lead 1
PQ Index 12
** Contaminants
Silicon 21
Sodium 5
Soot value 0
Soot % 0.0
Oxidation 12
Sulphate 18
Nitrates 7
Fuel % 5
Water % not detected
** Additives & Lubricant condition
Magnesium 15
Calcium 2863
Zinc 1166
Phosphorous 1024
Boron 2
Sulphur 11630
TBN 9.9
** Viscosity
cSt 40 degrees Celcius 84.3
cSt 100 degrees Celcius 12.5