Note that copper is an additive in this oil, hence the high ppm reading.
Also note that the car now has over 180,000 miles on it. Given that it seems to have had quite a sketchy first owner (I am the third and the second was awesome), this is something of an achievement.
Summary of the OCI:
- This is actually my THIRD run on this oil. I don't have a UOA from the second because I lost the sample.
- Driving was mixed: highway, suburban roads, and stop-and-go. There was also a fair amount of idling and stationary revs (holding RPMs at 2k or so) from what I did to track down a coolant leak.
- Slightly heavy foot on cold starts, with a fair bit of throttle but never over 2500 RPM until coolant is at operating temp.
- Lots of WOT and some redline every day, especially near the end of the OCI.
- Oil consumption is up from previous runs: about 1 qt/1450 mi.
- I've also had intermittent O2 sensor codes, which seem to have returned after I replaced both O2 sensors.
Wear indicators show no sign of trouble, although obviously we know that's not necessarily an all-clear. The oil itself seems to be continuing to hold up quite well considering the stress. TBN is nice and strong now, which indicates that the chemistry has settled and I could go for much longer OCIs if I wanted.
However, obviously the oil consumption is a bit of a concern. I also suspect that burned oil is fouling my O2 sensors (and possibly plugs), and affecting the tune.
For my next (current) OCI, I've decided to do something a bit different. RLI has a low-ash 15w-40, which I think might help: the lower VII content might help ring seal, and the lighter additization might keep the burned oil from leaving deposits. I'm running that product right now and will pull a sample in 3,000 miles to compare.
On to the report. I've highlighted the top line for better readability:
The other lines are previous samples. In order from top to bottom (click for threads):
RLI BioSynXtra 5w-40 HD (first run)
RLI BioSyn SHP 0w-30
Motul 300V 5w-40 #2
Motul 300V 5w-40 #1
Motul 8100 X-Cess 5w-40
Also note that the car now has over 180,000 miles on it. Given that it seems to have had quite a sketchy first owner (I am the third and the second was awesome), this is something of an achievement.
Summary of the OCI:
- This is actually my THIRD run on this oil. I don't have a UOA from the second because I lost the sample.
- Driving was mixed: highway, suburban roads, and stop-and-go. There was also a fair amount of idling and stationary revs (holding RPMs at 2k or so) from what I did to track down a coolant leak.
- Slightly heavy foot on cold starts, with a fair bit of throttle but never over 2500 RPM until coolant is at operating temp.
- Lots of WOT and some redline every day, especially near the end of the OCI.
- Oil consumption is up from previous runs: about 1 qt/1450 mi.
- I've also had intermittent O2 sensor codes, which seem to have returned after I replaced both O2 sensors.
Wear indicators show no sign of trouble, although obviously we know that's not necessarily an all-clear. The oil itself seems to be continuing to hold up quite well considering the stress. TBN is nice and strong now, which indicates that the chemistry has settled and I could go for much longer OCIs if I wanted.
However, obviously the oil consumption is a bit of a concern. I also suspect that burned oil is fouling my O2 sensors (and possibly plugs), and affecting the tune.
For my next (current) OCI, I've decided to do something a bit different. RLI has a low-ash 15w-40, which I think might help: the lower VII content might help ring seal, and the lighter additization might keep the burned oil from leaving deposits. I'm running that product right now and will pull a sample in 3,000 miles to compare.
On to the report. I've highlighted the top line for better readability:
The other lines are previous samples. In order from top to bottom (click for threads):
RLI BioSynXtra 5w-40 HD (first run)
RLI BioSyn SHP 0w-30
Motul 300V 5w-40 #2
Motul 300V 5w-40 #1
Motul 8100 X-Cess 5w-40