Front tires 1 yr old, new tires on rear in 2020. 2 New Chassis batteries, newer coach batteries. Upgraded shocks and safe-t-steer. just had 60,000 service done. A diesel engine is meant to run, and this has provided us with multiple cross country trips over the last 5 years, over almost every mountain pass. No problem with power towing a 4 door jeep wrangler with a family of 5. Already set up for Air force one brake system. Always stored in a heated garage and have all service records. Great family coach and have averaged over 10,000 miles each year. Gas mileage avg. 8.5 to 9.5 mpg.