12-24-2025, 01:34 PM
I just bought a used diesel truck, a 2015 model with about 100,000 miles, to use for occasional towing and as a project vehicle, and I want to make sure I'm starting off on the right foot with preventative maintenance beyond the basic oil changes. I've heard conflicting advice about the necessity of fuel additive treatments and how often to service the emissions system, specifically the DPF, to avoid costly problems down the line. For experienced diesel owners, what are the key maintenance items you prioritize on a higher-mileage truck that doesn't see daily use? How do you approach fuel quality and additives, and what are the warning signs of impending DPF or EGR issues that I should be monitoring during my regular checks to catch problems early?