I sell TriboDyn lubricants, several here use it, test have shown it is the best protection available...
If you want a copy of a independent test performed in Finland it's posted below ...
Thank You very much War Wagon for the information on the fram mobile 1 filters. I have a brand new one in the back seat of the truck, it will now go directly to the trashing can. I aint a taking any chances of having a filter crap out and destroy this engine. It has to last Me for a very long while.I use a local lab: Lab One Inc. The key to good oil samples is to be using the same oil in the engine. Switching brands to what's on sale can mess up your results. Switching to synthetic can flash copper high from the oil cooler on some engines.
Other than finding the limits of the engine oil... Oil filters are really cheap and not all have caught up with the extended drain intervals. Further defective oil filters run for a long time are just that: useless.
Most oil brands are close enough with exceptions like TriboDyn. Synthetic vs. conventional has clear advantages esp. for high heat tolerance. The real consideration for most should be the oil filter.
@MrMarty51 The Mobil1 oil filter is made by The FRAM Group. That company in total has changed hands again recentaly, but, there was a TDR post of a OCOD FRAM that took out a 6.7 Cummins. It was a long Royal Cluster F to get the administrator company to pay for the engine. Most wouldn't use FRAM Toilet Paper, but, may be surprised at who owns and makes what. I was and their "I don't Care Attitude" over a defective filter I wanted to report means you are wasting money on the Mobil1 filter.
I wouldn't use a Wix plastic body fuel filter on a Duramax, but, locally it's the best oil filter available before I go mail order. The XP has wire backed media as new strength. Unlike the E-Core ACDelco cheap cheap cheap design I won't put on my engines anymore.
Tear-O-Later : Purolator in a Bosch can. They are toast (failed) at 3000 miles.
If you have any Purolator oil filters including brands they make NOW is a good time to remove it from your engine for something else. You can imagine my surprise when I cut this Bosch oil filter open and a pleat was torn on both ends. No I didn't break it, Link: It's a common EPIC Fu#k up for...www.thetruckstop.us