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Oil for AFM 5.3 GM engine, 2008 #4776157
06/03/18 09:49 AM
06/03/18 09:49 AM
Joined: Mar 2007
Posts: 100
Charleston, SC
steve40th Offline OP
steve40th  Offline OP
Joined: Mar 2007
Posts: 100
Charleston, SC
1. What kind of vehicle you have 2008 Silverado, 5.3 liter AFM flex fuel
2. What your owner's manual says -- not just viscosity, but certifications (look for acronyms like API SM, ILSAC GF-4, etc.) and change intervals as well. 5W30
3. Where you live, South Carolina
4. How you drive (easy? hard? fast? slow?) easy
5. What your daily drive is like (short trips? long trips? city? highway?) short trips, less than 15 miles twice a day, city
6. Whether your car has any known problems. This engine is known for lifters leaking by after sitting for a few hours, every morning for me, and ticking for a few seconds or longer after initial start up. Engine class is known for oil usage if lifters goes bad.
Mine has done this since I bought it with 92,000 miles. First oil change I used Mobil 1 5w30 DEXOS labeled, and the engine didnt tick till after 4000 miles. No oil usage and plug were fine. I also used AC delco filter with anti drain back filter.
Second and third oil changed I used Pennzoil Full synthetic platinum, or whatever their best stuff is, and the engine started ticking at less than 2000 miles upon start up.
Fourth oil change back to Mobil 1. Currently at 111000 miles.
So, my question is, what makes the oil within Mobil one bottle seem to maintain its integrity longer within my specific engine? Or is their an oil that actually can get into lifters quicker or stay in lifters longer due to the oils recipe. I would like to have oil last longer than 4 or 5 thousand miles in the engine. But if I have to change early, am I wasting money on synthetic.

Re: Oil for AFM 5.3 GM engine, 2008 [Re: steve40th] #4776164
06/03/18 10:01 AM
06/03/18 10:01 AM
Joined: Feb 2009
Posts: 1,578
wv
krismoriah72 Offline
krismoriah72  Offline
Joined: Feb 2009
Posts: 1,578
wv
Its a mechanical issue with these engines..cant fix that with oil. Its just a noise and tons of people just get used to it. I have over 230K on my tow rig and it is noisy at startup..til it warms up.

I have used 5w30, 10w30, 5w40 and 10w40 from my oil stash and also tried WIX, ACDelco and Fram filters. Nothing changed in the sound department..

Bottom line is that they are great engines that have poor fuel mileage... So no sense in using high dollar oils.

Re: Oil for AFM 5.3 GM engine, 2008 [Re: krismoriah72] #4776169
06/03/18 10:11 AM
06/03/18 10:11 AM
Joined: Dec 2016
Posts: 6,226
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 6,226
Waco, TX
Originally Posted By: krismoriah72
Bottom line is that they are great engines that have poor fuel mileage... So no sense in using high dollar oils.


I agree.... synthetics are a waste of money unless you are pulling some VERY heavy trailer loads in high heat.
I'd run 10W-40 or 15W-40 in that thing in Texas.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Oil for AFM 5.3 GM engine, 2008 [Re: steve40th] #4776181
06/03/18 10:25 AM
06/03/18 10:25 AM
Joined: Aug 2017
Posts: 39
OH
08z06 Online content
08z06  Online Content
Joined: Aug 2017
Posts: 39
OH
maxlife 1040

Re: Oil for AFM 5.3 GM engine, 2008 [Re: JohnnyJohnson] #4776206
06/03/18 10:58 AM
06/03/18 10:58 AM
Joined: Dec 2006
Posts: 8,364
Illinois
mrsilv04 Offline
mrsilv04  Offline
Joined: Dec 2006
Posts: 8,364
Illinois
.

Last edited by mrsilv04; 06/03/18 11:02 AM.

2004 Silverado - on its 3rd Jasper engine in less than one year.
Re: Oil for AFM 5.3 GM engine, 2008 [Re: steve40th] #4776239
06/03/18 11:44 AM
06/03/18 11:44 AM
Joined: Mar 2011
Posts: 2,197
Indiana
Indydriver Offline
Indydriver  Offline
Joined: Mar 2011
Posts: 2,197
Indiana
Iíve used all kinds of oil in my 2007 5.3 Flex. At 135,000 miles, it burns a quart plus between oil changes which go 7-8000 miles per the OLM. The best oil Iíve found to reduce consumption is M1 HM which cuts it in half. So I use that unless I have some other oddball stuff to dump. For example, at AZ, they had Pennzoil 10W-30 Pure Platinum jugs on clearance for $10 then $5/ jug. Canít resist that. So, itís running itís first load of this and just needed a quart added at 4,000 miles since OC.

Last edited by Indydriver; 06/03/18 11:45 AM.

2014 Camaro 2SS/RS LS3 Vert 14,000 M1
2012 Sienna 79,000 M1
2007 Tahoe 140,000 PP

Re: Oil for AFM 5.3 GM engine, 2008 [Re: steve40th] #4776251
06/03/18 12:07 PM
06/03/18 12:07 PM
Joined: Mar 2008
Posts: 6,808
USA
slacktide_bitog Offline
slacktide_bitog  Offline
Joined: Mar 2008
Posts: 6,808
USA
Is there an AFMuzzler for these systems like the VCMuzzler that exists for Hondas?

Re: Oil for AFM 5.3 GM engine, 2008 [Re: slacktide_bitog] #4776255
06/03/18 12:13 PM
06/03/18 12:13 PM
Joined: Mar 2011
Posts: 551
High Country of Western NC
sopususer Offline
sopususer  Offline
Joined: Mar 2011
Posts: 551
High Country of Western NC
Originally Posted By: slacktide_bitog
Is there an AFMuzzler for these systems like the VCMuzzler that exists for Hondas?


Yes, the Range AFM disabler. Here's their website. Unit can be found for less on Amazon or on other automotive sites.

Range AFM Disabler


2017 Subaru Impreza 2.0
QSUD 0W-20/Wix 57055
2017 GMC Sierra Denali 5.3
QSUD 0W-20/NAPA Gold 100255
2017 Subaru Forester 2.5
QSUD 0W-20/NAPA Gold 7055
Re: Oil for AFM 5.3 GM engine, 2008 [Re: steve40th] #4776354
06/03/18 02:57 PM
06/03/18 02:57 PM
Joined: Mar 2007
Posts: 100
Charleston, SC
steve40th Offline OP
steve40th  Offline OP
Joined: Mar 2007
Posts: 100
Charleston, SC
Thanks for advice etc everyone. SO, I am fortunate in the ticking noise issue many hear with this motor. The ticking noise only comes on after engine oil is used for some time, as stated in first post. Not when new, so something within the oil additives Mobil One uses is able to last a pretty long time.
I will try HM next time. I think GMs engineers didnt do their homework on the proper lifters or design of this AFM feature.

Re: Oil for AFM 5.3 GM engine, 2008 [Re: steve40th] #4776466
06/03/18 04:30 PM
06/03/18 04:30 PM
Joined: Sep 2008
Posts: 3,890
Southeast Texas
gfh77665 Offline
gfh77665  Offline
Joined: Sep 2008
Posts: 3,890
Southeast Texas
I have had great results using straight SAE 30 wt. (and even SAE 40 wt.) in the TX summer. My two Silverados have 160K and 285K.

Re: Oil for AFM 5.3 GM engine, 2008 [Re: steve40th] #4776541
06/03/18 05:52 PM
06/03/18 05:52 PM
Joined: Jul 2005
Posts: 8,827
Maricopa, AZ
dave1251 Offline
dave1251  Offline
Joined: Jul 2005
Posts: 8,827
Maricopa, AZ
I just used Pennzoil conventional in mine and consumption was almost immeasurable.


make the inside of your engine oil cap white.
don't use.
Re: Oil for AFM 5.3 GM engine, 2008 [Re: Indydriver] #4776724
06/03/18 09:54 PM
06/03/18 09:54 PM
Joined: Jul 2017
Posts: 293
OKLAHOMA
GMguy84 Offline
GMguy84  Offline
Joined: Jul 2017
Posts: 293
OKLAHOMA
Originally Posted By: Indydriver
Iíve used all kinds of oil in my 2007 5.3 Flex. At 135,000 miles, it burns a quart plus between oil changes which go 7-8000 miles per the OLM. The best oil Iíve found to reduce consumption is M1 HM which cuts it in half. So I use that unless I have some other oddball stuff to dump. For example, at AZ, they had Pennzoil 10W-30 Pure Platinum jugs on clearance for $10 then $5/ jug. Canít resist that. So, itís running itís first load of this and just needed a quart added at 4,000 miles since OC.



I have a '01 Suburban 5.3 with 250K miles TX/OK truck all its life that had LOUD piston slap and lifers, I used my "free" stash of M1 HM 10-40 I had and it quited it down alot and now runs VERY smooth !!!


HUGE difference vs other oils I have used in past


Dave


05 Silverado Z71 5.3 DELO 400 XLE 10W30/FUG XG3675

01 Suburban 5.3 Mobil 1 HM 10W40/M1-206A

1982 TRANS AM (KITT) Mobil Super 5K HM 10W40/M1-302A
Re: Oil for AFM 5.3 GM engine, 2008 [Re: steve40th] #4776835
06/04/18 04:19 AM
06/04/18 04:19 AM
Joined: Mar 2007
Posts: 100
Charleston, SC
steve40th Offline OP
steve40th  Offline OP
Joined: Mar 2007
Posts: 100
Charleston, SC
Whats in the Mobil 1 HM compared to their regular MObil M1

Re: Oil for AFM 5.3 GM engine, 2008 [Re: steve40th] #4777058
06/04/18 10:02 AM
06/04/18 10:02 AM
Joined: Feb 2009
Posts: 1,578
wv
krismoriah72 Offline
krismoriah72  Offline
Joined: Feb 2009
Posts: 1,578
wv
mobil 1 HM 10w40 VOA...kinda old but here it is

https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/2345322/1

if anything the add pack is weak compared to HDEO 10w30

Re: Oil for AFM 5.3 GM engine, 2008 [Re: krismoriah72] #4777556
06/04/18 07:00 PM
06/04/18 07:00 PM
Joined: Mar 2007
Posts: 100
Charleston, SC
steve40th Offline OP
steve40th  Offline OP
Joined: Mar 2007
Posts: 100
Charleston, SC
Originally Posted By: krismoriah72
mobil 1 HM 10w40 VOA...kinda old but here it is

https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/2345322/1

if anything the add pack is weak compared to HDEO 10w30


Interesting, I think conventional oil is pretty good. Compared to oils of 20 years ago, oil keeps getting better, lasts longer, protects better as oil companies keep refining the recipe.

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