What To Look For When Buying A Used Semi Truck May 2026

: Request a detailed history showing regular oil changes (typically every 15,000–30,000 miles for modern diesels), filter replacements, and cooling system flushes.

: Ensure oil is clean and free of metal shavings. Milky residue in the oil or coolant suggests cross-contamination. 3. Structural & Mechanical Integrity what to look for when buying a used semi truck

The engine is your most expensive component to repair, making its inspection non-negotiable. : Request a detailed history showing regular oil

: Blue smoke can indicate oil burning, while excessive white or black smoke suggests fueling or aftertreatment issues. 000 miles for modern diesels)