Posted on 10/31/2025
As the temperatures drop and days get shorter, diesel vehicle owners have a few extra tasks to consider. Diesel engines are durable and efficient, but they react differently to cold weather than gasoline engines. If you're heading into fall without a maintenance plan, you may be risking hard starts, reduced fuel economy, or unexpected downtime. Here are five important maintenance steps to help keep your diesel car or truck running strong through the colder months. 1. Inspect and Replace Fuel Filters Fuel filters play a crucial role in diesel performance. Diesel fuel naturally contains more impurities than gasoline, and over time, those contaminants build up in the fuel filter. During colder months, water and debris trapped in the filter can freeze, slowing the flow of fuel and leading to hard starts or rough idling. If you haven’t replaced the fuel filter recently, fall is a good time to do it. Some diesel vehicles have both a primary and secondary fuel f ... read more