Originally Posted by PGreenSVT
No it isn't. The end all fix for the oem oil cooler problem is a Bulletproof Diesel remote oil cooler that eliminates the oem cooler. Replacing the oil cooler, running a coolant filter, and using Rotella Ultra ELC is a good less expensive alternative but it is not 100% bullet proof.
He's 100% correct ELC doesn't fix anything but longer change intervals and running a little cooler, less to worry about from cavitation etc.
The problem is the crap casting sand, gelling from neglected gold coolant etc. running around inside the engine clogging the tiny vanes in the cooler itself.