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New Chevy 6.6 gas vs. diesel, worth 10k extra?

24K views 29 replies 16 participants last post by  360ci  
#1 ·
Basically like the title says. On a new Chevy is the Dmax worth an extra 10k? Have a couple of diesels now but one is an old LB7 Dmax and the dreaded 6.0 powerstroke. I've talked to a few people with the new gas 6.6 and they like it a lot better than the old 6.0 gas.

Getting ready to order a new truck and was looking at the options. I posted a similar thread on plowsite as this truck will primarily be for plowing but figured there would be more exposure here.
 
#3 ·
A friend of mine has an 2012ish 6.6 duramax and absolutely loves it. He’s either pulling a 7x14 enclosed trailer which it never even feels. Or a 6x12 or 7x14 (can’t remember) dump trailer which he says it doesn’t struggle with unless it’s completely loaded down with dirt.
 
#5 ·
Gasser all the way. Now recommended new diesels don't idle for more than 5 minutes. I couldn't imagine being in the middle of the plow route and having to go through a regen cycle for emmsisions.
 
#7 · (Edited)
No more diesels for me. My experience are modern diesels are unreliable, expensive junk due to the emissions standards. Any fuel savings will go out the door from repair costs plus the initial purchase price.

My uncle, a diesel mechanic for over 40 years, repeats the same thing. Stay away from diesel trucks.
 
#15 ·
I used to work on diesel a lot, 7.3 power stroke and 5.9 Cummins the best, the modern diesel are way too expensive reliability drop for stupid DEF, emissions, EGRS, it ruined unless you deleted it. Problem is some state if get pulled over by state troopers and if they know your diesel emissions is deleted will have to pay big fines for that. Ford 7.3 Godzilla is way to go
 
#10 ·
I've got a 2002 Duramax that I love. Diesel trucks started going to **** after DPF was introduced. 2006 was the last good year for the Duramax.
Like I said. I've got an 04 and it's been good but I haven't been around any newer diesels... Leave it to the govt to mess up a good thing
 
#12 ·
Basically like the title says. On a new Chevy is the Dmax worth an extra 10k? Have a couple of diesels now but one is an old LB7 Dmax and the dreaded 6.0 powerstroke. I've talked to a few people with the new gas 6.6 and they like it a lot better than the old 6.0 gas.

Getting ready to order a new truck and was looking at the options. I posted a similar thread on plowsite as this truck will primarily be for plowing but figured there would be more exposure here.
Diesel won't pay off
We've done the Math 6 ways from Sunday
You would have to keep the truck for 300,000 miles and accumulate that much use in the time period it took to pay it off (4-6 years) or you wouldn't see a return in the extra ten grand.
The diesel doesn't do something the gas won't
There was a time in technology where this was true
But not any longer
 
#21 ·
Changed the starter on my furd 6.7... what a chit show. Remove tire, and inner wheel well. Then good luck maneuvering the damn thing out. Put in a napa replacement that worked 3 times before leaving me stranded with a tow bill. Replaced again and there goes 8 hours down with a bill.
It is nice though having all that power and the sound of a diesel with no egr and straight piped is fabulous. I recommend that investment to all after your warranty expires.
But this is my company truck and would never personally own a diesel. Too difficult and time consuming to work on (it can be done though) not to mention the parts prices.
 
#25 ·
Well, after reading everything here and talking to about 2 dozen local guys who have 2018 and newer diesels (using for work only, not personal) and hearing what all issues they've had regarding emissions issues 95% sure going gas. Found out last week while on vacation that my 6.0 powerchoke has a cracked head too..... :rolleyes:
 
#26 ·
No more diesels for me. My experience are modern diesels are unreliable, expensive junk due to the emissions standards. Any fuel savings will go out the door from repair costs plus the initial purchase price.

My uncle, a diesel mechanic for over 40 years, repeats the same thing. Stay away from diesel trucks.
This. Plus, I service many properties close together, 4 on one block for instance so the constant start/stop cycles are hard enough on a gas engine, even worse on a diesel that relies on certain operating temp for max efficiency and fewer problems. The only plus with the 6.6 diesel is the 10 speed automatic. I hear it's great on the mpg front but for $10k+ up front purchase price over the 6.6 gas with the tried and true 6 speed auto the diesel is a hard sell if you don't pull more than a few tons.
 
#28 ·
I have the 10 speed in my 2020 f350 6.2 gasser and so far I'm pretty happy with it. Put it in tow haul mode and it downshifts with engine brakiing and pulls 10k trailer with ease. It always in the right gear.
 
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#30 ·
6.6 gas over diesel for sure if you don't plan to tow more than a few tons regularly. The 6.6 is incomparable to the 6.0 that preceded it. The new 6.6 gas has direct injection, may need more frequent oil changes, etc, and the 6 speed auto is a proven design. In back to back testing with a Ford 7.3 gas with the 10 speed both trucks were nearly identical in MPG under the same load.

For me, I have clients that are close to one another for regular weekly service. On one block I have 4, and another block I have 3, etc. The truck is only running for a minute or less at times which isn't good for any engine, and especially bad for a diesel, so gas engine is the best option for me in terms of long term ownership/durability.

The Ford 6.2 is nearing the end of it's lifecycle for emissions, but is a solid engine and comes with a 10 speed auto in the F350, but only a 6 speed in the F250. I have a Ram now but will probably go GM next. HEMI maintenance is the highest of all the gas V8's. Copper core spark plugs that need replacing every 40k - 16 spark plugs! I was lucky to have an extended warranty as I had problems every other year with the exhaust manifolds coming loose from the block which saved $1600 each time thanks to the warranty. Only have 178k kms on the truck now and it's ten years old. Had a head gasket done at 168k kms and extended warranty covered that at $2500.08 CAD. Reliability is one thing, down time is another. I'm religious with fluid change times and the like.