The engine is your most expensive component to repair, making its inspection non-negotiable.
: Request a detailed history showing regular oil changes (typically every 15,000–30,000 miles for modern diesels), filter replacements, and cooling system flushes. what to look for when buying a used semi truck
: Check for documented engine overhauls, transmission repairs, or aftertreatment (DPF/SCR) service. If an engine was rebuilt, verify it was done by a certified mechanic. The engine is your most expensive component to