a few things caught my eyes -
1) he uses rotella syn oil with 10000 mile change interval (cummins recommends valvoline premium blue dino oil)
2) he uses fuel treatment and lucas additives
3) he is 70 years old and still drives 160000 miles a year... miracle
4) 1.6 million miles, he had no allison transmission work done other than regular maintenance. bulletproof!
