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Chevy Silverado and GMC Sierra Duramax Fuel Mileage

505 messages,  Last post on Nov 28, 2009 at 11:02 AM

You are in the Diesels Forum. Your Host is kcram

What is this discussion about? Chevrolet Silverado 2500HD, Chevrolet Silverado 3500, GMC Sierra 2500HD, GMC Sierra 3500, Diesel, Fuel Efficiency (MPG), Truck

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#131 of 505 Re: Oil Change [roughneck] by kcram HOST Nov 13, 2005 (5:41 pm)
Replying to: roughneck (Nov 11, 2005 3:37 pm) Even in sub-zero, 15 minutes to warm up a diesel really isn't helping the engine. Diesels will generate heat much faster when they're actually working, and that means moving the truck and going through the gears. Even sub-zero, my Cummins is put in gear after no more than 3-4 minutes unless I'm brushing off the snow... then the truck is driven as soon as I get back in the cab. I have full heat in just 5 minutes at highway speed.   kcram - Pickups Host
#133 of 505 warm up time by roughneck Nov 14, 2005 (1:24 pm)
We have diesel electric generators(catapillars) at work and if you don't let them warm up 15 minutes or so and then put a load on it will kill the motor or have big puffs of black smoke coming from the exhaust just barely chugging along. So I still believe in warming mine up more than 3-4 minutes.
#134 of 505 buying 2006 Duramax by turbo8 Nov 14, 2005 (8:03 pm)
Iam buying a 2006 LBZ crew cab 4x4 in 2 days. I could use some input! Should I be getting the 310 hp model because it is a whole lot cheaper (thousands) Or is this new Durmax the way to go. Is fuel mileage the same. Or should I be buying a gas Silverado Help! Replies to this message: spademan (Nov 15, 2005 7:59 pm) brycar (Nov 18, 2005 7:14 am) stoneg (Nov 19, 2005 5:49 pm) wjr1027 (Nov 27, 2005 3:30 pm)
#135 of 505 Re: buying 2006 Duramax [turbo8] by spademan Nov 15, 2005 (7:59 pm)
Replying to: turbo8 (Nov 14, 2005 8:03 pm) Anybody I have talked to that has the big V8 is only getting in the mid teens for mpg empty. After they load them up it drops down to 10 or lower. I got the DMax for this reason and get 18 in town and almost 24 on the highway. It depends a lot on how you drive,
#136 of 505 Re: warming up a diesel in cold weather. by 2k5spdcummins Nov 17, 2005 (1:40 pm)
I will have to agree with Kcram on the warm up. Yea you don't want to start out full throttle blasting down the road but idling for 15minutes is a waste, it will never really warm it up in cold cold conditions. I usually startup and idle for around 5minutes or so then head down the road but going very easy starting out. Once you have driven a mile or two down the road it will warm up in a heartbeat. If you live in a colder area you might think about plugging in the block heater.   2000 Dodge Ram2500 regular cab 4x2 with 5speed.   25mpg hwy (A/C and 70mph) 20mpg city (no A/C) 17-19 City (With A/C) lowest mpg 16.4mpg pulling a 17ft. ski boat rural driving. Replies to this message: ezshift5 (Dec 15, 2005 11:02 am) deiselden (Dec 19, 2005 10:16 am) sbeach1 (Jan 18, 2006 7:44 am) fredk2 (Jan 18, 2006 6:16 pm)
#137 of 505 Re: buying 2006 Duramax [turbo8] by brycar Nov 18, 2005 (7:14 am)
Replying to: turbo8 (Nov 14, 2005 8:03 pm) I would get the one with the 360 hp i thinks it better than teh 310hp Engine, Duramax 6600 Turbo Diesel V8, (300 HP [223.8 kW] 3000 rpm, 520 lb.-ft. [702.0 N-m] 1600 rpm) (LLY) $5,310.00 Engine, Duramax 6600 Turbo Diesel V8, (360 HP [268.0 kW] 3200 rpm, 650 lb.-ft. [881.0 N-m] 1600 rpm) (LBZ)
#138 of 505 Re: buying 2006 Duramax [turbo8] by stoneg Nov 19, 2005 (5:49 pm)
Replying to: turbo8 (Nov 14, 2005 8:03 pm) For what it's worth...I've got the '05 2500hd cc 4x4 310HP and don't pull anything and only get about 12.5 mpg city 15 hwy. As diesel prices are now higher that gas (even 93 octane!), if your not pulling anything or driving considerably high mileage don't bother with a diesel. I keep reading about people getting 20+ mpg, and I frankly just don't see it. I have added/tried EVERY possible aftermarket way (edge, 4" exhaust, intake, acetone, stanadyne, etc.)to improve mpg and some have helped me go from 9mpg city to 12.5, so hope its not to late, and you made the best decision for you. Replies to this message: wjr1027 (Nov 27, 2005 3:30 pm)
#139 of 505 Re: buying 2006 Duramax [stoneg] by wjr1027 Nov 27, 2005 (3:30 pm)
Replying to: stoneg (Nov 19, 2005 5:49 pm) I had been interested in the Duramax since it's conception in 1999. I know when it first came out, they said it would get around 28 miles per gallon. I agree with stoneg, that when they came out diesel was around $110 a gallon. I bought my first in 2001 and was getting 18 miles per gallon. When I bought a 35 fifth wheel trailer, I got around 12 miles per gallon. I purchased my newest one in 2003. I put a straight through muffler on it and pull and drive all the time. I do get 22 miles per gallon on the highway and 17 in town. I do like it and am very impressed with it. I have looked at the new 360 horse Duramaxes and they have the 6 speed Allison transmission which should make the truck get better gas mileage. I know that I will get one soon.
#140 of 505 Door emblems by spademan Dec 01, 2005 (6:34 pm)
Can anybody tell me where to order some better looking door emblems? I've seen them around but can never catch anyone to ask them. They look more flashy than factory. Any info would be great!

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