Keller-Heartt News Blog

BlueDEF

Crystallized DEF is one of the leading causes of SCR failure and downtime. Find out what causes it, how to fix it, and how to prevent it.

Keller Heartt Collaborator Jan 19, 2026

BlueDEF

Not all diesel exhaust fluid is the same. Learn how to improve your diesel engine performance with BlueDEF® from Keller-Heartt Oil.

Keller Heartt Collaborator Sep 13, 2024

BlueDEF

Learn how much DEF your fleet requires to run optimally.

Keller Heartt Collaborator Aug 16, 2024

BlueDEF

With the rising popularity of diesel exhaust fluid (DEF) comes ample questions about this vital automotive fluid. Read on for answers to our FAQs.

Keller Heartt Collaborator Mar 1, 2024

Keller-Heartt Oil Blog