To complement Trailer Life’s long-running RV Clinic column, we’ve launched an online technical question-and-answer section devoted to diesel tow vehicles.

Topics cover all aspects of diesel vehicles from engines to transmissions, gearing to fuel economy and tires to turbos. Each month Bruce W. Smith responds to one question in depth, and readers’ comments add to the conversation.

January 2019

Diesel Deletes, Good or Bad?


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If you have a question about maintenance, repairs or upgrades to your diesel truck, SUV or van, scroll down to the Leave a Reply box at the bottom of this page. Please include your full name, city and state or province.


Bruce W. SmithA respected automotive and RV journalist and longtime Trailer Life contributor, Bruce W. Smith has held numerous editorial titles at automotive and boating magazines, and authored more than 1,000 articles, from tech to trailering. He considers his home state of Oregon a paradise for RVing and outdoor adventure.


 

6 COMMENTS

  1. I have a 2013 Chevy 2500HD. I’ve heard of people removing the DEF system to get better performance. This seems like a complicated process. I’m assuming this would involve a new CPU chip. What if I needed to take the truck to the dealer for service? Would they still service it? I have 65,000 miles on it, but I would wait until the warranty ended before I did this. Thank you.

  2. I have a 2012 GMC 3500 Duramax. I am being told to have it “deleted” by most everyone. What is your opinion? Advantages and disadvantages?

  3. I have a 2015 Ram 1500 EcoDiesel. I’m curious about burning biodiesel. I’ve read some of the pros and cons, and I’ve read that, initially, this may require a fuel-filter change, as the biodiesel is a solvent and will dislodge some sludge. I’ve gone through that and determined I’m comfortable with the procedure. Generally, I’d like to hear your take on running biodiesel, and, specifically, I’d like to know how quickly that fuel filter will clog up and what that will look like (will I get warnings from the computer, or will it just fail?), and if that will be a frequent issue going forward. What if I’m switching back and forth, as biodiesel is not readily available in many regions?

    • Thanks, Bob. Bruce W. Smith has added your question to his list to consider for future Diesel Tech Q&A posts. In the meantime, he offered this brief reply:

      Prior to 2007, all diesels were B100 (100 percent biodiesel) compatible. After that, the EPA changed the emissions standards on diesels, so they now require at least B15 (15 percent biodiesel) fuel. Today’s diesel engines can run on B20 — but only if that biodiesel meets ASTM D7467-17 standards — which “home-grown” biodiesel probably doesn’t.

      As for fuel-filter plugging, early on that was a problem — more so with those making their own biodiesel than biodiesel sold by large manufacturers. Here’s a good explanation: http://www.baldwinfilter.com/literature/english/10%20TSB's/06-1.pdf

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