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Amsoil ASL 5w30, 9K, 04 Chevy Tahoe, 224K #4479145
08/04/17 04:45 PM
08/04/17 04:45 PM
Joined: Aug 2011
Posts: 244
Texas
dhellman12 Offline OP
dhellman12  Offline OP
Joined: Aug 2011
Posts: 244
Texas

Oil was changed at the time of sample. Cold air intake was installed at 216K miles that replaced the entire air intake assembly, including the MAF. Good news was that I haven't had any more MAF codes trip, but bad news is that it seems to have made no difference at all in silicon levels. Also sounds like with the streaks of lead, the engine may be getting ready to throw a bearing...

Make/Model: GM 5.3L V-8
Vehicle: 2004 Chevy Tahoe

Code:
OIL             Ams ASL		Ams ASL		Ams ASL		Ams ASL		Ams ASL		Ams ASL		
MILES IN USE    9,129		9,213		10,045		9,037		9,246		8,124		
MILES ON UNIT   224,106		214,977		205,764		195,719		186,682		177,436		
SAMPLE TAKEN    7/14/17		1/2/17		7/15/16		12/14/15	6/29/15		11/30/14	
MAKE UP OIL	0.5		0		0		0		0		0		

ALUMINUM	4		3		4		3		4		3		
CHROMIUM	0		1		1		0		0		0		
IRON		13		12		15		11		12		9		
COPPER		11		13		11		12		10		12		
LEAD		24		11		22		13		30		7		
TIN		0		0		0		0		5		0		
MOLYBDENUM	141		138		130		143		160		144		
NICKEL		1		1		1		2		1		0		
MANGANESE	0		0		0		1		0		0		
SILVER		0		0		0		0		0		0		
TITANIUM	0		0		0		0		0		0		
POTASSIUM	2		1		2		4		4		0		
BORON		53		39		42		36		61		45		
SILICON		29		28		30		35		28		31		
SODIUM		9		9		11		10		9		9		
CALCIUM		3039		3191		2928		3570		3461		3247		
MAGNESIUM	13		13		13		17		14		12		
PHOSPHORUS	558		648		558		655		627		702		
ZINC		661		748		628		773		800		801		
BARIUM		0		0		0		0		0		0		

SUS @ 210F	64.4		63.8		68.8		66.0		62.6		64.6		
Visc @ 100C	11.45		11.29		12.64		11.88		10.94		11.51		
Flashpoint	445		445		400		410		420		430		
Fuel %		<0.5		<0.5		<0.5		<0.5		<0.5		<0.5		
Antifreeze %	0.0		0.0		0.0		0.0		0.0		0.0		
Water %		0.0		0.0		0.0		0.0		0.0		0.0		
Insolubles %	0.2		0.4		0.5		0.3		0.2		0.4		
TBN		3.1		3.0		2.2		3.3		3.3		3.1		



Blackstone Inc Comments:
Lead is back up in this report and in the past, we've attributed that to particle streaks here and there. That might be true, but looking at the overall trend, we could be seeing excess bearing wear. We typically see steady wear from healthy engines, so erratic trends can indicate trouble. We aren't ready to make that call here, especially since other metals look great, but lead is certainly something to watch. Monitor oil pressure in case it starts reading lower than usual. The thick viscosity is fine and the TBN was strong, but stay under 10K miles for now and check back.


05 Kawasaki BF750 - 265hrs
12 Jeep 3.8L - Toyota 5w30 63K
04 DMax 6.6L - Amsoil AME 15w40 226K
04 Tahoe 5.3L - Amsoil ASL 5w30 238K
00 WS6 5.7L - Amsoil ASL 5w30 254K
Re: Amsoil ASL 5w30, 9K, 04 Chevy Tahoe, 224K [Re: dhellman12] #4479148
08/04/17 04:50 PM
08/04/17 04:50 PM
Joined: Apr 2017
Posts: 515
Fort Worth TX
TheKracken Offline
TheKracken  Offline
Joined: Apr 2017
Posts: 515
Fort Worth TX
How do you like your Tahoe? I am a big toyota guy and love my truck but being a dad here in a month is making me want a dad vehicle....the 4 runners used cost too much but the tahoe seems nice.


2011 Prius 96k miles RLI 5w20
97 Toy T100 4x4: amsoil 0w20 242k Miles
04 Toy Sienna awd: Pennzoil 0w20 281k Miles
Re: Amsoil ASL 5w30, 9K, 04 Chevy Tahoe, 224K [Re: dhellman12] #4479186
08/04/17 05:42 PM
08/04/17 05:42 PM
Joined: Mar 2004
Posts: 20,758
Upstate NY
Donald Offline
Donald  Offline
Joined: Mar 2004
Posts: 20,758
Upstate NY
With copper and lead somewhat high, there is likely a bearing problem. You have gotten over 200k from the engine and probably can go more.

When looking for air leaks, look beyond the normal stuff. But wait for another oil change before you say the replacement of the air intake did not help lower the silicon.


2015 Subaru Forester 2.5 engine/CVT
2015 Ford F250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
Re: Amsoil ASL 5w30, 9K, 04 Chevy Tahoe, 224K [Re: dhellman12] #4479216
08/04/17 06:28 PM
08/04/17 06:28 PM
Joined: Mar 2004
Posts: 20,758
Upstate NY
Donald Offline
Donald  Offline
Joined: Mar 2004
Posts: 20,758
Upstate NY
What kind of air filter are you using.


2015 Subaru Forester 2.5 engine/CVT
2015 Ford F250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
Re: Amsoil ASL 5w30, 9K, 04 Chevy Tahoe, 224K [Re: dhellman12] #4479426
08/04/17 10:23 PM
08/04/17 10:23 PM
Joined: Jun 2017
Posts: 388
Western usa
Ammofirst Offline
Ammofirst  Offline
Joined: Jun 2017
Posts: 388
Western usa
Would running oil high in moly help any ?

Re: Amsoil ASL 5w30, 9K, 04 Chevy Tahoe, 224K [Re: dhellman12] #4479471
08/05/17 12:13 AM
08/05/17 12:13 AM
Joined: Dec 2016
Posts: 6,239
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 6,239
Waco, TX
Honestly.... I'd try an inexpensive 15W-40 HDEO and see if that helps.


"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: Amsoil ASL 5w30, 9K, 04 Chevy Tahoe, 224K [Re: dhellman12] #4479526
08/05/17 03:12 AM
08/05/17 03:12 AM
Joined: Aug 2010
Posts: 5,675
WatUpDoc
ltslimjim Offline
ltslimjim  Offline
Joined: Aug 2010
Posts: 5,675
WatUpDoc
Improve air filtration if at all possible as a step 1 as others have said.

Your's isn't the flex fuel 5.3 is it?

This ACDelco A3181C Professional air filter looks like the best option for your stock replacement:

https://www.amazon.com/ACDelco-A3181C-Professional-Air-Filter/dp/B00PM374FO

It's made in the USA compared to several China outsourced. However, Fram may be a decent alternative to the AC Delco such as this model CA8755A. I don't know the efficiency ratings on these, but would definitely make sure your intake is sealed with no leaks.


92 Civic Hatch (stolen frown RIP)
07 Honda Fit Sport (A/T) WELCOME thumbsup
Re: Amsoil ASL 5w30, 9K, 04 Chevy Tahoe, 224K [Re: Ammofirst] #4479574
08/05/17 06:25 AM
08/05/17 06:25 AM
Joined: Feb 2009
Posts: 1,578
wv
krismoriah72 Offline
krismoriah72  Offline
Joined: Feb 2009
Posts: 1,578
wv
Originally Posted By: Ammofirst
Would running oil high in moly help any ?


That oil he is using looks very high in moly to me.

I have an 03 Suburban with the same engine and almost the same miles.. im running Shell 5w40 in mine.

Re: Amsoil ASL 5w30, 9K, 04 Chevy Tahoe, 224K [Re: dhellman12] #4479694
08/05/17 09:18 AM
08/05/17 09:18 AM
Joined: Aug 2011
Posts: 244
Texas
dhellman12 Offline OP
dhellman12  Offline OP
Joined: Aug 2011
Posts: 244
Texas
I can assure you it's not the air filter. I've replaced the stock air box, tried K&N, Wix, and Amsoil air filters. And on this most recent I replaced the MAF and installed a specter cold air intake which replaces all OEM tubing up to the throttle body. I really expected to see a big reduction in silicon on this run...

Any downside to trying a heavier oil?


05 Kawasaki BF750 - 265hrs
12 Jeep 3.8L - Toyota 5w30 63K
04 DMax 6.6L - Amsoil AME 15w40 226K
04 Tahoe 5.3L - Amsoil ASL 5w30 238K
00 WS6 5.7L - Amsoil ASL 5w30 254K
Re: Amsoil ASL 5w30, 9K, 04 Chevy Tahoe, 224K [Re: ltslimjim] #4479695
08/05/17 09:22 AM
08/05/17 09:22 AM
Joined: Aug 2011
Posts: 244
Texas
dhellman12 Offline OP
dhellman12  Offline OP
Joined: Aug 2011
Posts: 244
Texas
Yes, this is the flex fuel motor. Have not run E85 since owning the vehicle (bought at 119K miles)


05 Kawasaki BF750 - 265hrs
12 Jeep 3.8L - Toyota 5w30 63K
04 DMax 6.6L - Amsoil AME 15w40 226K
04 Tahoe 5.3L - Amsoil ASL 5w30 238K
00 WS6 5.7L - Amsoil ASL 5w30 254K
Re: Amsoil ASL 5w30, 9K, 04 Chevy Tahoe, 224K [Re: dhellman12] #4479951
08/05/17 01:48 PM
08/05/17 01:48 PM
Joined: Aug 2010
Posts: 5,675
WatUpDoc
ltslimjim Offline
ltslimjim  Offline
Joined: Aug 2010
Posts: 5,675
WatUpDoc
Afaik, the only downside to going up to 40 grade is worse MPG. You may consider installing a pre-filter dust wrap or getting a filter that includes one.


92 Civic Hatch (stolen frown RIP)
07 Honda Fit Sport (A/T) WELCOME thumbsup
Re: Amsoil ASL 5w30, 9K, 04 Chevy Tahoe, 224K [Re: dhellman12] #4480001
08/05/17 02:57 PM
08/05/17 02:57 PM
Joined: Aug 2010
Posts: 5,675
WatUpDoc
ltslimjim Offline
ltslimjim  Offline
Joined: Aug 2010
Posts: 5,675
WatUpDoc
For example, aFe has a Pro Guard 7 filter that is oiled but seems pretty hefty. I know some K&N cone filters come with matching pre-filter wraps.

http://afepower.com/stock-replacement-and-universal-performance-air-filters

Otherwise could you make your own pre-wrap that is water repellent? That's the nice thing about pre-wraps.

IMO, whatever it takes to sanely reduce Si readings and perhaps trying a 40 grade for a couple OCI is the best recommendations going forward. You could try anything from M1 0w40 since it's sold in gal at WM now or something like Rotella 10w30 since as an HDEO alternative or the M1 5w40 HDEO.


92 Civic Hatch (stolen frown RIP)
07 Honda Fit Sport (A/T) WELCOME thumbsup
Re: Amsoil ASL 5w30, 9K, 04 Chevy Tahoe, 224K [Re: ltslimjim] #4480022
08/05/17 03:20 PM
08/05/17 03:20 PM
Joined: Aug 2011
Posts: 244
Texas
dhellman12 Offline OP
dhellman12  Offline OP
Joined: Aug 2011
Posts: 244
Texas
Considering si hasn't changed with 4 different filter brands, and completely replacing the air intake system, I don't think that's where it would be coming from. Any other suggestions where it could be getting in at?


05 Kawasaki BF750 - 265hrs
12 Jeep 3.8L - Toyota 5w30 63K
04 DMax 6.6L - Amsoil AME 15w40 226K
04 Tahoe 5.3L - Amsoil ASL 5w30 238K
00 WS6 5.7L - Amsoil ASL 5w30 254K
Re: Amsoil ASL 5w30, 9K, 04 Chevy Tahoe, 224K [Re: dhellman12] #4480182
08/05/17 07:58 PM
08/05/17 07:58 PM
Joined: Sep 2005
Posts: 14,333
Canada
addyguy Offline
addyguy  Offline
Joined: Sep 2005
Posts: 14,333
Canada
With this continuing problem with what appears to be bearing wear, I'm surprised you haven't tried a heavier oil.

Being an Amsoil guy, I'd get some XL 10W-40 in there for a 7-8k run and see how it does if I were you!


2010 Kia Soul 2U - 2.0L I-4, auto; 132k miles.
M1 EP 10W-30; OEM Kia filter.
Re: Amsoil ASL 5w30, 9K, 04 Chevy Tahoe, 224K [Re: dhellman12] #4480214
08/05/17 08:39 PM
08/05/17 08:39 PM
Joined: Sep 2015
Posts: 2,260
Malaysia
zeng Offline
zeng  Offline
Joined: Sep 2015
Posts: 2,260
Malaysia
I'm not sure if Silicon here is part of road dirt ...... it's normal here , I suppose.

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