Originally Posted By: WylieCoyote
Originally Posted By: demarpaint
On occasion engineers screw up. I recall reading about GM reprogramming OLM's a few years back to shorten the interval. I read here recently that Ford bumping up a grade on some of their engines. My suggestion is avoid blanket statements like a good synthetic oil can go 10K miles. In some apps it can, others it can't. If you want to stretch an OCI, or be sure your OLM is right get a UOA and know for sure.
This is what killed the timing chain and guides in my sister-in-law's Equinox. That engine sounded like a poorly-maintained diesel at startup. I no longer trust OLMs and just change it out at 5,000 miles. Well, except for the one in my 2011 Camaro which routinely starts reporting 20% oil life remaining before it even hits 5,000 miles.
Sounds like poorly designed engines.
Originally Posted By: demarpaint
On occasion engineers screw up. I recall reading about GM reprogramming OLM's a few years back to shorten the interval. I read here recently that Ford bumping up a grade on some of their engines. My suggestion is avoid blanket statements like a good synthetic oil can go 10K miles. In some apps it can, others it can't. If you want to stretch an OCI, or be sure your OLM is right get a UOA and know for sure.
This is what killed the timing chain and guides in my sister-in-law's Equinox. That engine sounded like a poorly-maintained diesel at startup. I no longer trust OLMs and just change it out at 5,000 miles. Well, except for the one in my 2011 Camaro which routinely starts reporting 20% oil life remaining before it even hits 5,000 miles.
Sounds like poorly designed engines.