Understanding the CAT C15 Engine: Features, Specs, and Maintenance Discover the complete guide to the Caterpillar C15 engine, including CAT C15 horsepower, torque ratings, engine specifications, reliability, fuel economy, common issues, and buying considerations. Learn how this legendary diesel engine compares to modern alternatives, what to look for when purchasing a rebuilt or used unit, and why it remains a popular choice for heavy-duty trucking and industrial applications in 2026. https://hdengines.com/blogs/news/cat-c15-engine-specs-history-and-known-issues