Thanks, looked very close to mine @ 5000 miles on the oil and 12K on the engine. I use Cummins Blue 15w-40 and the fleet guard LF16035 filter. Looking forward to your next analysis. Like the fact the filter is easy to access

BTW, my duty cycle was not as severe...Mostly flat and unloaded, very little stop and go, rpm's at 1500 min. all the time, engine brake on always, some wot for short distances. Temp. here like yours and towing 20% of the time in the Smoky Mountains.
__________________

7.5 3500QC 6.7CTD 68RFE Build date June 2007
Superchips tuner 3808, Boost/EGT Laser Gauge, Airaid cold intake