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Re: 2007 Chev 6.0 L with active fuel management
[Re: BenM]
#4780984
06/08/18 06:59 AM
06/08/18 06:59 AM
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Joined: Nov 2008
Posts: 13,109 NH
supton
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Joined: Nov 2008
Posts: 13,109
NH
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I can't answer, but I'll ask, why change to 15W40? if 5W30 has been working fine, why change? Is it to get to a common oil?
2011 Toyota Camry, base, 2.5L/6MT, 176k, hers 2010 Toyota Tundra DC, 4.6L/6AT, 145k, ours 1999 Toyota Camry LE, 2.2L/4AT, 201k, his
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Re: 2007 Chev 6.0 L with active fuel management
[Re: BenM]
#4781023
06/08/18 07:32 AM
06/08/18 07:32 AM
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Joined: Dec 2017
Posts: 3,702 SE British Columbia, Canada
Snagglefoot
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Joined: Dec 2017
Posts: 3,702
SE British Columbia, Canada
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Here is what I know.
1. The 6 liter did not come with AFM, so no worries there. Not sure where you are getting your info. The 5.3 and 6.2 did. The 4.8 did not. Take a look at your the top of your air filter box. It will state your engine displacement. 2. The AFM with the 5.3 had real problems with their AFM 3. The AFM problem went away in 2014 with the redesign of the Chev V-8’s. The 5.3 and 6.2 became Gen 5 engines with a higher pressure oil pump with an electronically controlled solenoid to allow 60psi pressures at highway speed and 40 psi at low speeds and idling. The AFM was completely redesigned. The 6 liter is still a Gen 4 and does not have the updated oil pump system. Nor does it have AFM. 4.There is an issue with the screen on any of the engines. The screen is right below the oil pressure sensor mounted at the rear driver’s side of the top of the block. If that screen plugs, the oil pressure sensor will read 0. I have no knowledge of any other screen other than at the oil pickup. 5.If you want your AFM system to remain healthy in a 2014 onward AFM equipped engine, you need to be running the GM recommended Dexos Oil. This is no place for old school xw40 oil. 6. However, running a xw40 weight in a high mileage 6 liter should not cause problems, in my opinion.
Last edited by Snagglefoot; 06/08/18 07:54 AM.
If you want the job done right......do it yourself.
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Re: 2007 Chev 6.0 L with active fuel management
[Re: BenM]
#4781064
06/08/18 08:13 AM
06/08/18 08:13 AM
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Joined: May 2002
Posts: 21,388 Oakville, Ontario
Patman
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Joined: May 2002
Posts: 21,388
Oakville, Ontario
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FWIW, the 2019 Corvettes come factory filled with 0w40 now and it has a 6.2 L engine with active fuel management. So GM feels that it's safe to run thicker oils with active fuel management. (they have also stated that they recommend this 0w40 for 2014-2018 Corvetttes too)
2018 Corvette, 9k, M1 ESP Formula 5w30 & NAPA Gold 2006 Civic EX Coupe, 148k, PUP 5w20 & Fram Ultra 2010 BMW 328i X-Drive,111k, GC 0w40 & Fram Ultra
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Re: 2007 Chev 6.0 L with active fuel management
[Re: Patman]
#4781088
06/08/18 08:45 AM
06/08/18 08:45 AM
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Joined: Dec 2017
Posts: 3,702 SE British Columbia, Canada
Snagglefoot
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Joined: Dec 2017
Posts: 3,702
SE British Columbia, Canada
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FWIW, the 2019 Corvettes come factory filled with 0w40 now and it has a 6.2 L engine with active fuel management. So GM feels that it's safe to run thicker oils with active fuel management. (they have also stated that they recommend this 0w40 for 2014-2018 Corvetttes too) You are assuming the AFM system on the LT4 is identical with the lesser engines. Could be but unless I saw proof, I would stick with GM's recommendations for each individual engine.
If you want the job done right......do it yourself.
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Re: 2007 Chev 6.0 L with active fuel management
[Re: BenM]
#4781093
06/08/18 08:51 AM
06/08/18 08:51 AM
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Joined: May 2005
Posts: 3,552 Alberta, Canada
Smokescreen
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Joined: May 2005
Posts: 3,552
Alberta, Canada
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BenM.....I have 2 words for you BlackBear Performance.
I just had the traditional tune and it woke the truck up in a very noticeable way...yet retains the reliability.
13 Civic Si 2.4L- 69Kkms(43Kmi)-PP,Wix 05 LeSabre 3.8L-210Kkms(134Kmi)-PP,Wix 03 Sierra 2500 6.0L-204Kkms(127Kmi)-PP,Wix
All with mpg > EPA
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Re: 2007 Chev 6.0 L with active fuel management
[Re: Snagglefoot]
#4781133
06/08/18 09:32 AM
06/08/18 09:32 AM
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Joined: Oct 2008
Posts: 19,285 Sunny Florida
SteveSRT8
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Joined: Oct 2008
Posts: 19,285
Sunny Florida
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FWIW, the 2019 Corvettes come factory filled with 0w40 now and it has a 6.2 L engine with active fuel management. So GM feels that it's safe to run thicker oils with active fuel management. (they have also stated that they recommend this 0w40 for 2014-2018 Corvetttes too) You are assuming the AFM system on the LT4 is identical with the lesser engines. Could be but unless I saw proof, I would stick with GM's recommendations for each individual engine. We went through all this clear back in 04-05 as Chrysler brought MDS to the market. The simple fact is that virtually all oil controlled cylinder deactivation systems seem to tolerate a very wide spread of viscosity. No downside except incredibly small variations in activation. Just think about a dead cold 30w oil, it's a LOT thicker than it will be at operating temp. yet they kick in just fine as the engine heats up.
"In a democracy, dissent is an act of faith." J. William Fulbright Best ET-12.79 @ 111 mph 4340 pounds, Street tires Just like we go to Publix
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Re: 2007 Chev 6.0 L with active fuel management
[Re: BenM]
#4781134
06/08/18 09:32 AM
06/08/18 09:32 AM
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Joined: Jan 2013
Posts: 1,676 Wisconsin
WiskyBadger
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Joined: Jan 2013
Posts: 1,676
Wisconsin
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6.0s do not have AFM as stated in a earlier post. Sounds like someone was trying sell you something. Stick with a 5w30 maybe a HM oil. No reason for a 15w40 in a LS engine. 6.0s are tough engines and have long lives with standard 5w30 bulk oil. We have around 30 in our fleet at work with 0 problems other then manifold bolts breaking, which is common. Most of these engines have 200,000 + miles some 300,000 and one they recently sold had 425,000, all on cheap bulk no name oil from a 55 gallon drum.
14 Buick Verano �Blanche� 61k Castrol Edge & Delco filter 01 Ford Ranger �Rick� 166k Castrol Magnatec Motorcraft 78 Chevy Stepside 11 Chevy Traverse 114k Carquest 5w30 and Carquest filter
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Re: 2007 Chev 6.0 L with active fuel management
[Re: BenM]
#4781195
06/08/18 10:19 AM
06/08/18 10:19 AM
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Joined: Dec 2014
Posts: 515 MB - Manitoba
FastLane
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Joined: Dec 2014
Posts: 515
MB - Manitoba
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Just keep using 5W30 or if you want try 10W30. The LS V8's don't need thick oil.
2010 Silverado 4.8 4x4 Mobil 1 5W30 ACDelco PF48E 2002 Mustang GT 4.6 Mobil 1 5W30 MC FL-820S 1966 Cessna 150 Phillips 20W50 2013 Mercury 30hp Mystic 25W40
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Re: 2007 Chev 6.0 L with active fuel management
[Re: SteveSRT8]
#4781378
06/08/18 01:47 PM
06/08/18 01:47 PM
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Joined: Dec 2017
Posts: 3,702 SE British Columbia, Canada
Snagglefoot
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Joined: Dec 2017
Posts: 3,702
SE British Columbia, Canada
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FWIW, the 2019 Corvettes come factory filled with 0w40 now and it has a 6.2 L engine with active fuel management. So GM feels that it's safe to run thicker oils with active fuel management. (they have also stated that they recommend this 0w40 for 2014-2018 Corvetttes too) You are assuming the AFM system on the LT4 is identical with the lesser engines. Could be but unless I saw proof, I would stick with GM's recommendations for each individual engine. We went through all this clear back in 04-05 as Chrysler brought MDS to the market. The simple fact is that virtually all oil controlled cylinder deactivation systems seem to tolerate a very wide spread of viscosity. No downside except incredibly small variations in activation. Just think about a dead cold 30w oil, it's a LOT thicker than it will be at operating temp. yet they kick in just fine as the engine heats up. That conclusion could not have been applied to the pre-2014 GM AFM system simply because it was a disaster. They came from the factory working fine but many of them wiped out their lifters with time. For the redesign, GM asked for Dexos.
Last edited by Snagglefoot; 06/08/18 01:56 PM.
If you want the job done right......do it yourself.
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Re: 2007 Chev 6.0 L with active fuel management
[Re: BenM]
#4781395
06/08/18 02:08 PM
06/08/18 02:08 PM
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Joined: Dec 2017
Posts: 3,702 SE British Columbia, Canada
Snagglefoot
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Joined: Dec 2017
Posts: 3,702
SE British Columbia, Canada
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Hold it. I have to stop getting drawn into these high viscosity discussions and get back to the Bitoger chant. “If they ask for 5w20, use 10w40. It’s twice as much and must be better.” Bye for now.
Last edited by Snagglefoot; 06/08/18 02:08 PM.
If you want the job done right......do it yourself.
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