Common Misconceptions about Diesel Engines

During cold weather, you may see a new or used heavy duty truck in Texas sitting and running, but is that a good thing? Are diesel engines supposed to idle for long periods of time? Let’s explore this question and several more, to expose some common myths and misconceptions.

1. Diesel motors are hard to start in cold weather so you should let them idle all night.

Many years ago, large diesel trucks used heavy motor oils, and the fuel turned into a gel when it got cold. If these trucks sat for long periods in the cold, even in Southern Texas, they might not start. However, today’s technology produces better fuel, lubricants, batteries, and cold weather hard-starting problems no longer exist. Many people still believe you have to let big trucks idle in the cold.

2. A large truck doesn’t burn much fuel when it idles?

Many people still believe this myth because they used to see so many big rigs idling at truck stops and waiting for loads at the dock. They figured truckers must have a good reason for idling or so many truckers wouldn’t do this if it burned too much fuel. According to the New Mexico Environmental Department, diesel engines use about one gallon of fuel per hour as they sit and idle.

3. Diesel Engines Need Long Warm-Up Periods

Some drivers in Texas let a used heavy duty truck warm up for five minutes or longer, but this is not necessary. Since modern diesel fuel does not gel, long warm-ups are not needed. In fact, most manufacturers recommend no longer than three minutes warm-up time.

Idling for long periods places a great deal of wear and tear on your engine. When you need parts or service for your used heavy duty truck in Texas, Kyrish Truck Centers have what you need.