At least at these prices, it feels like we are driving around in gold! 
Seriously though, any tips for driving more economically?
One tip I read was to limit idling time. Turning off your engine when parked can save a surprising amount of fuel.
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I’ve owned a 2015 Duramax for a few years, and I’ve found that my fuel mileage can vary widely. Factors like load capacity really affect it. If I’m towing anything, I usually see a drop. Otherwise, I average around 20-22 mpg highway.
That’s so true! I always recommend checking tire pressure regularly. Under-inflated tires can really decrease your mileage.
Interesting point about tire pressure, taylorkim. But don’t forget about driving habits! Aggressive acceleration and hard braking can also hurt fuel efficiency.
Agreed, chad33. I drive mostly on highways and keep my speed consistent, which helps. But I’ve noticed on steep terrain my mileage drops. Anyone else experience that?
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I can relate, nhodges! Hilly routes can be rough on the Duramax. Just curious, have you guys tracked your mileage after maintenance? I wonder how much of a difference it makes.
That’s a good question! I’ve noticed improvements after regular oil changes and air filter replacements—definitely something to keep in mind.
Honestly, I sometimes feel like it’s a guessing game whether my mileage will be good or not, especially if I change loads frequently! Anyone else feel that way?
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Haha, right?! Maybe I should just install a crystal ball in my truck to predict my gas mileage! But seriously, I think weight is the main issue.
You’re not alone, blairdouglas! I think it’s a combination of factors. Have you checked which gear you’re in? Sometimes shifting too early or late can mess with fuel usage.
Great point, tjohnson! I’ll pay more attention to my shifting. Reflecting on all this, I guess knowing your truck and optimizing it can make a big difference.