Originally Posted By: Bwalker
Originally Posted By: OVERKILL
Originally Posted By: Bwalker
This vehicle is driven in incredibly dusty conditions. Along with lites of highway cruising at 90mph and alot of time in 4wd.
I have also checked the air filter and the seal lip was a bit buggered up on the OEM air filter. The band clamp to the intake was a bit loose as well, but didnt appear to be leaking. I plan to resample at 10K and see what it looks like.
Any comments?
I'd cut the OCI in half after fixing the air intake tract leaks and resample at that duration. If things look more respectable, I'd then try 15K and then 20K again once you know you don't have a source of foreign contaminants.
That's a big issue with extended OCI's, you have that much longer where an issue, like your intake tract leak, can persist unchecked, and because the oil isn't changed, you aren't flushing out those contaminants. That leads to wear, which I believe we are seeing evidence of with the elevated iron numbers.
Your noted usage profile really isn't the issue here, and may in fact be fine with this OCI length with a properly sealed intake tract.
Any idea how long silica will stay in the oil given residual carry over? Assuming the problem is fixed do you expect silica would return to normal for the first sample at 10k?
You would flush the majority of it out with the change. You would expect more normal readings on the 10K OCI, if they are not, then at least you haven't run 20K with an intake tract leak