Semi trucks are heavy-duty commercial vehicles that handle the bulk of freight transportation across highways and local routes. Whether you drive one professionally, own a fleet, or maintain these machines, understanding their engine systems and maintenance needs is essential. Semi truck engines operate under demanding conditions—long hours, heavy loads, and varied terrain—which means their oil and fluid requirements differ significantly from passenger vehicles.
These articles cover the specific maintenance tasks that keep semi trucks running reliably. You'll learn how to select the right oil grade for different engine types and operating conditions, understand drain intervals for heavy-duty diesel engines, and handle the larger fluid capacities these vehicles require. Whether you're performing routine maintenance or troubleshooting engine performance, these guides address the practical questions that arise when working on commercial truck powerplants.