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Mods? He'll the truck has catted down pipes, full exhaust, intercooler, all plastic pressure piping from the turbos to throttle body have been replaced, cold air intake and custom tuning. After that last sample I did switch the company providing the tuning for the truck so it'll be interesting...

Here is an update on the next 2 oil changes. Of note is that as of March of 2014 I switched jobs my commute went from 160 miles of 75MPh highway a day to 35 miles of stop and go a day. I've also come to realize that the OEM PCV system on these trucks are garbage and they do not evacuate the...

They do tend to run rich on throttle tip in...almost as if the fuel gets bumped in anticipation of the boost rather than together. When you stomp on it, the exhaust will typically belchsome black smoke and then clear up.

Originally Posted By: GM4LIFE Can't you run this oil a lot longer being the Signature Series oils are rated at 25K miles? 25K for N/A engines under "normal" conditions. This is a turbocharged engine so the stresses on the oil is different.

Originally Posted By: timeau IMO, you are overrun your oil. But it is hard to be sure since TAN is not available. Another thing is I don't like high copper in your UOA. Not sure how TAN would play into this...

Originally Posted By: A_Harman You have a 2013 truck and already have 60k miles on it? How are you rolling up so many miles? I was driving about 170 miles a day for work for the first 16 months of ownership. Copper has been coming down with each oil change. TBN is still good at the end of...

Ok, re-post now without my personal information on the report! First oil change was at 5K with Mobil1, second oil change at 10K with Amsoil. I have been running 10k intervals since. Attached is the report with the 20K, 30K and 40K results. The 50K sample is sitting in my garage and I just did...