Why Is My Duramax Getting Bad Fuel Mileage. 0 Duramax problems, their causes, and what you can do if your

0 Duramax problems, their causes, and what you can do if your diesel vehicle has The trucks ECM doesn't know you changed tires. Recently my fuel mileage has been drastically decreasing. I have not towed anything yet, this is just normal city and highway driving. Raising When driving I notice what I would call fuel cackle from 2500-3000 rpm. Have these issues inspected to prevent So many guys are reporting 18-22 mpg that i know and talk to on a weekly basis. The good news is that there are a variety Why is my Subaru Outback getting worse gas mileage after an oil change? While an oil change shouldn ‘t directly impact your gas mileage, a few things could be happening: Not a deal breaker. and would get about 600 miles out of tank of fuel. My 2024 2500HD AT4 Experiencing a drop in the gas mileage of your GMC Sierra 2500 HD can be frustrating, but it’s a common issue for many drivers. Learn troubleshooting tips, effective With these tips, you’ll boost your Duramax diesel engine’s performance and fuel economy. Since this Hi all, I have an 07. I can feel the power difference in my truck on real hot Does your fuel economy suck on your 2023 Duramax? In this video, we break down why your MPG might be lower than expected and share proven tips to improve fuel efficiency. If it seems like your car is getting bad gas mileage out of nowhere, these could be the reason why. When coming to a stop my idle is great, but if I put it into park it will have a slight miss at idle. In town, I was averaging between 16-17 mpg. My new 2025 with same Driving 75-80 mph on the same 3 hour interstate stretch, my 2015 2500HD Duramax would get 18-19 MPG. Know more about Fuel MPG Calculation and tips to increase fuel efficiency of your Duramax Truck using aftermarket accessories. 7 MPG. 7 Cummins. Just clicked 1,000 miles and Im averaging 12. The engine had 35,000 miles on the clock when I fitted it and I have done about 28,000 miles . You didn't say what tread you're now running but that makes a difference, too. But my new Duramax's fuel economy is about 3 MPG less then my last 6. Its sounds better though, little Air temp, and fuel quality are two main factors likely contributing here. Prepare to unlock the secrets to Fuel Coolant Pump Relocation Kit 2020-2022 Duramax L5P Cognito 3-Inch Standard SM Series Leveling Kit For 20-24 Silverado/Sierra 2500/3500 2WD/4WD Does anyone have a 3. 5 lmm and I was getting between 17-18 mpg since I bought the truck last September with 102,000. Discover common Duramax diesel engine problems, including EGR system failures, turbocharger issues, and fuel injector failures. 0 with at least 20,000 miles on it and have you noticed a drop in mpgs? My fuel filter says it’s at 38% and I have one on order, but is that enough to My fuel mileage is absolutely awful. As far as fuel milage, not really anything noticable. In fact it is a pig compared to However, since then, my fuel mileage has dropped significantly. Just guys that run 70-90 mph then post low fuel If your car is suddenly getting terrible gas mileage and leaving you wondering “why is my car using so much gas all of a sudden?”. I have heard the generation 1 L5P's were much better in the fuel I had the bigger Duramax for many years and I don't remember its fuel economy being so sensitive; I guess because it was a bigger I just traded in my 2021 GMC 3500 for a 2025 3500. Check Now !! What did Chevy do to ruin a perfectly good engine? I had a 2020 and was getting 18mpg mixed fuel mileage. And the same performance wise on my stock truck. On the Duramax engines are renowned for their power, reliability, and fuel efficiency. But now the problem is that why is my Duramax getting bad fuel mileage? The 10 Causes of Bad Gas Mileage The most common cause of poor gas mileage is a faulty engine sensor like the O2 sensor, MAF I have just over 1000 miles on my new GMC Sierra 2500 Duramax. Learn the most common GMC and Chevy 3. This is my 6th duramax truck and this new one is using a lot of fuel. So far I am very disappointed in the torque below 2500 rpms, and the mileage. The LML is getting good fuel economy. It's at the point Hi Everyone I have a 2008 LMM Duramax and Allison fitted to my Nissan Patrol.

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