3.0 Duramax vs 6.2L V8 - which option is best?

[AT4-858SD]

I am making the move from a Tundra to the the AT4 or AT4X. I have Mercedes Sprinter that has the diesel. I'm fine with DEF and I like the mpgs that motor gets (four-cylinder). I do not tow, but I drive a lot. We also make family camping trips and pleanty of Mammouth trips in the winter. I don't plan on building out the truck and will keep it pretty much as is.

I'm on the fence about which motor to get. MPG is really important considering I've been puking money into gas in the Tundra that deson't get great mileage. I was hopign to get some feedback and opinions from folks up here that can give me some insight to both motors. What is your real-world MPG? I live in San Diego so cold weather really isn't an issue. If ya'll can let me know what you like / don't like about your motor and what you recommmend, I would greatly appreciate it.

Thanks - T

 

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[grover]

Was originally going to go with the 6.2 until the 3.0l diesel was announced. I took one for a test ride when they first started showing up and was sold. From towing to across country trips it hasn't disappointed, I have a '20 1500 AT4. Great on fuel, very easy on Def when regular running, towing will use more of course. Summer fuel under 70mph have seen 35mpg, over 80mph mid 20's highway running. Take both out for test ride

 

[AT4-858SD]

Was originally going to go with the 6.2 until the 3.0l diesel was announced. I took one for a test ride when they first started showing up and was sold. From towing to across country trips it hasn't disappointed, I have a '20 1500 AT4. Great on fuel, very easy on Def when regular running, towing will use more of course. Summer fuel under 70mph have seen 35mpg, over 80mph mid 20's highway running. Take both out for test ride

That's what I'm talking about! Thanks for your reply!

 

[GibbyESS9]

I bought 2025 At4 1500 with the baby duramax last January. Love it. Mileage on 3 hour trip to vacation house I average 31 mpg st 70-75 mph. Love it can't say it enough. I drive several gmc Yukon Denalis and at4 for work and those are all gassers. First diesel for me. Def consumption very minimal, but I don't tow often. Deisel option was cheaper also.
Good luck

 

[AT4-858SD]

I bought 2025 At4 1500 with the baby duramax last January. Love it. Mileage on 3 hour trip to vacation house I average 31 mpg st 70-75 mph. Love it can't say it enough. I drive several gmc Yukon Denalis and at4 for work and those are all gassers. First diesel for me. Def consumption very minimal, but I don't tow often. Deisel option was cheaper also.
Good luck

Thank you for the feedback!

 

[TripleB]

You're rolling the dice with either.

GM 3.0L Duramax Diesel Thrust Bearing Problem Causes Engine Failure, No Recall?

GM’s 3.0L Duramax diesel thrust bearing problem is causing engine failure causing GM to issue a TSB, but oddly no recall.

pickuptrucktalk.com

 

[pigpen23]

If you're looking for a throw-you-into-the-seat, great passing power, throaty-sounding truck, get the 6.2L. If you're looking for better mileage and need a little more towing grunt truck, get the 3.0L.

I've had both (currently have the 3.0L), and that's about as simple as I can explain them. Love the mileage of the Babymax, but I think in the next truck I'll go back to the 6.2L for a more sport-like feel. I miss the growl of the 6.2L.