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Old 08-06-2018, 09:35 PM   #71
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Rotella T4 15W-40 5000 mile change intervals, no oil use, 189,000 2003 LB7 Chevrolet 2500HD SRW 4D. Pulls 6500lb toy hauler + 2 Motorcycle or 1990 HR ALUMA-LITE XL 5th Wheel @ 9300 lbs loaded.
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Old 08-15-2018, 10:45 AM   #72
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Mobil One full synthetic and Wix filter.
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Old 08-23-2018, 09:04 PM   #73
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2013 2500 with 202k. Pulls 5th wheel to campground and takes me to work. Runs all day every day. Rotella T with Wix, change on DIC. Allison too. Burns nothing between changes. Great truck but sold it. Afraid of costly repairs overdue.

Bought 18 L5P @ 445 HP. Will run same oil and filters.

Oh yeah, not happy with new one at all.
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Old 08-23-2018, 09:11 PM   #74
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I use diesel oil in my Duramax. I don't care which diesel oil, they're all the same, whichever is on sale.
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Old 08-24-2018, 10:50 PM   #75
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Originally Posted by Mobile scout View Post
2013 2500 with 202k. Pulls 5th wheel to campground and takes me to work. Runs all day every day. Rotella T with Wix, change on DIC. Allison too. Burns nothing between changes. Great truck but sold it. Afraid of costly repairs overdue.

Bought 18 L5P @ 445 HP. Will run same oil and filters.

Oh yeah, not happy with new one at all.
What don't you like about the L5P? Looking at one and thinking of trading my 14 LML?
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Old 08-25-2018, 06:29 PM   #76
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I traded in an '11 Dually for an '18 Dually and couldn't be happier, plus the extra Ponies help pulling heavy.
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2018 Silverado 3500HD High Country Dually 4x4 Duramax/Allison, 2016 Redwood 39MB, Disc Brakes, Mor/ryde IS, GY 17.5" H tires, 5.5K Onan, Dual ACs, auto level, auto sat dish, stacked washer/dryer, residential fridge, King sleep number. Michelle & Ann
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Old 08-26-2018, 08:42 AM   #77
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First 3000 miles I've experienced poor fuel mileage and performance ( vs LML ) Also had some technology glitches like flickering dash lights, uncooperative radio and trans felt like it didnt disengage at a stop.

I dont see this one giving me the same trouble free miles the LML did.

Note: watch out for trucks built before 2/18. Trans cooler line is rubbing on right frame horn. Not under warranty either. Remove grill and inspect. If problem the cut hose and zip tie section around hose. Reinspect annually.

Note: L5P emission equipment warranty is 50k. Not 100 k like drivetrain. You also have to add high idle to software and can add manual regen if you want. ( commercial/ fleet only )
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Old 10-07-2018, 10:20 AM   #78
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what oil do you use

have a 2007 3500 lbz with 129000 klm have used Valvoline premium blue and a qt of lucas every 8 months. no problems no oil burn good power dedicated to rv towing.
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Old 10-07-2018, 11:10 AM   #79
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05 LLY with 86,xxx
Use mobile 1 filter and Chevron Delo 400 @ 5K mile intervals.
I also run the Delo in the 82 FJ40 land cruiser 2F engine.
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Old 10-12-2018, 07:15 PM   #80
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Either Rotella T6 or Mobil 1 Delvac Syn. 5w40 with a Baldwin B1441 filter.
Changes between 6,000 and 7,000 miles with Blackstone Labs oil sampling.
77,000 trouble free miles.
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Old 11-02-2018, 11:02 AM   #81
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I use Amzoil 20-40 synthetic. Chang at 10,000mi.
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Old 11-14-2018, 07:43 PM   #82
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Try using Lucas fuel additive. I get 18/19 city 20/22 highway 05 lly duramax Allison crew cab long bed Lt Silverado 2005. I get10.5 to 11.8 towing a 40 foot Landmark Rushmore fifth wheel


Wow that's great milage! Any tuner or deletes?
I just bought a new to me 2012 drw and I'm averaging 13.5 and 10.5 towing 15k RV.
It's in the shop now getting deleted and a tow tune. 124 k miles
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Old 11-14-2018, 08:07 PM   #83
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I run diesel oil in my duramax. It doesn't seem to care the brand or if its synthetic or not.
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