10k Oil and filter.
2012 and 2015 Jeep Wrangler RHD's used on a dusty mail route. 5w30 Schaeffer's 9000 full synthetic w/regualar UOA's. In over 100k mail route stop and go driving, I've never had a UOA come back that showing excessive wear, dust, overly depleted additives or to much loss in...