Good evening all,
I could use a little help understanding the data in the attached oil analysis. This is the first time I've had the oil analyzed since I deleted the DPF and all related emissions systems and switched to Amsoil Signature Series Max-Duty Diesel 0W-40. I installed Amsoil's bypass filter system as I want to take the oil change interval to 30,000km. The time of sample was 18,000km. My main concern is oil breakdown and thickening. I noticed on the test that the viscosity at 100 degrees C is 14.4. Is this number too high? Has the oil thickened? I am concerned about cold startup protection - over the last year the engine has been making a "clack-clack" noise for about 1 seconds after startup. I've read that these OM642 engines are known for sloppy timing chains. The hydraulic tensioner can sometimes take a bit to pump up.
This engine works very hard on a regular basis pulling my loaded van over numerous mountain passes here in central British Columbia. I monitor the oil temperature in the crankcase via OBD and it regularly reaches 100C, I can't imagine what the temperature of the return line from the turbo charger must be. Ouch!
Questions:
1) Can this oil take the abuse of 30,000km worth of high temperature operation in this undersized turbo diesel engine?
2) 12ppm iron. Is that from crankshaft wear? is 12ppm considered below average considering the sample interval?
3) What about the viscosity test of 14.4 @ 100C? Is this normal for a 0W40 engine?
Thanks in advance,
Steve
I could use a little help understanding the data in the attached oil analysis. This is the first time I've had the oil analyzed since I deleted the DPF and all related emissions systems and switched to Amsoil Signature Series Max-Duty Diesel 0W-40. I installed Amsoil's bypass filter system as I want to take the oil change interval to 30,000km. The time of sample was 18,000km. My main concern is oil breakdown and thickening. I noticed on the test that the viscosity at 100 degrees C is 14.4. Is this number too high? Has the oil thickened? I am concerned about cold startup protection - over the last year the engine has been making a "clack-clack" noise for about 1 seconds after startup. I've read that these OM642 engines are known for sloppy timing chains. The hydraulic tensioner can sometimes take a bit to pump up.
This engine works very hard on a regular basis pulling my loaded van over numerous mountain passes here in central British Columbia. I monitor the oil temperature in the crankcase via OBD and it regularly reaches 100C, I can't imagine what the temperature of the return line from the turbo charger must be. Ouch!
Questions:
1) Can this oil take the abuse of 30,000km worth of high temperature operation in this undersized turbo diesel engine?
2) 12ppm iron. Is that from crankshaft wear? is 12ppm considered below average considering the sample interval?
3) What about the viscosity test of 14.4 @ 100C? Is this normal for a 0W40 engine?
Thanks in advance,
Steve
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