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#4693657 - 03/13/18 04:50 PM Amsoil ASL 5w30, 9K, 04 Chevy Tahoe, 233K
dhellman12 Offline


Registered: 08/29/11
Posts: 239
Loc: Texas
Oil was changed at the time of the sample. For the blackstone questions below.

Does the user this engine sees change significantly from sample to sample? No. Daily driver for the wife. Maybe more highway trips during the holiday season (Nov / Dec), but nothing else I can think of.

Hopefully this engine is running well with no unusual knocking noises or low oil pressure readings. No knocking noise, and no change in oil pressure. Still reads very strong.


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    9,088		9,129		9,213		10,045		9,037		9,246		
MILES ON UNIT   233,194		224,106		214,977		205,764		195,719		186,682		
SAMPLE TAKEN    2/24/18		7/14/17		1/2/17		7/15/16		12/14/15	6/29/15		
MAKE UP OIL	0.5		0.5		0		0		0		0		

ALUMINUM	6		4		3		4		3		4		
CHROMIUM	1		0		1		1		0		0		
IRON		18		13		12		15		11		12		
COPPER		14		11		13		11		12		10		
LEAD		10		24		11		22		13		30		
TIN		1		0		0		0		0		5		
MOLYBDENUM	168		141		138		130		143		160		
NICKEL		1		1		1		1		2		1		
MANGANESE	0		0		0		0		1		0		
SILVER		0		0		0		0		0		0		
TITANIUM	0		0		0		0		0		0		
POTASSIUM	2		2		1		2		4		4		
BORON		61		53		39		42		36		61		
SILICON		37		29		28		30		35		28		
SODIUM		10		9		9		11		10		9		
CALCIUM		3168		3039		3191		2928		3570		3461		
MAGNESIUM	127		13		13		13		17		14		
PHOSPHORUS	778		558		648		558		655		627		
ZINC		825		661		748		628		773		800		
BARIUM		0		0		0		0		0		0	

SUS @ 210F	65.9		64.4		63.8		68.8		66.0		62.6		
Visc @ 100C	11.86		11.45		11.29		12.64		11.88		10.94		
Flashpoint	450		445		445		400		410		420		
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 %	0.3		0.2		0.4		0.5		0.3		0.2		
TBN		3.0		3.1		3.0		2.2		3.3		3.3


Blackstone Inc Comments:
This trend in lead is awfully strange, but at least we're on the lower side of it this time. Does the user this engine sees change significantly from sample to sample? If so, maybe the up and down trend in bearing wear is partly due to that. It's certainly not a normal trend, but it is predictable and therefore hard to call a problem. Hopefully this engine is running well with no unusual knocking noises or low oil pressure readings. The TBN is fine and the slightly thick viscosity is not a problem. Check back in 10-11K miles on the oil.
_________________________
05 Kawasaki BF750 - 262hrs
04DMax 6.6L - Amsoil AME 15w40 222K
04Tahoe 5.3L - Amsoil ASL 5w30 235K
00WS6 5.7L - Amsoil ASL 5w30 253K

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#4693711 - 03/13/18 05:42 PM Re: Amsoil ASL 5w30, 9K, 04 Chevy Tahoe, 233K [Re: dhellman12]
tig1 Offline


Registered: 01/03/09
Posts: 13587
Loc: Illinois
Why 9K OCIs?
_________________________
2007 Ford Fusion 226,000 miles
M1 0-20 EP
2017 Ford Fusion 48K
M1 0-20 EP
10,000 mile OCIs on both engines
M1 ATF and MC LV
M1 10-30 in all OPE
MC filters


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#4693722 - 03/13/18 05:52 PM Re: Amsoil ASL 5w30, 9K, 04 Chevy Tahoe, 233K [Re: dhellman12]
FermeLaPorte Offline


Registered: 07/25/17
Posts: 454
Loc: Texas (south)
I wouldn't run a Chevy for anything more than 5,000 Miles.

Try going up to 10,000 next sample and see how changed it is.
_________________________
Always Mobil 1
2014 1.6L Nissan Versa Sedan, 5 spd, 5k OCI.
2011 3.5L Chevrolet Impala, Automatic, 5k OCI.

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#4694095 - 03/13/18 10:52 PM Re: Amsoil ASL 5w30, 9K, 04 Chevy Tahoe, 233K [Re: tig1]
Artem Offline


Registered: 10/30/10
Posts: 5100
Loc: Florida
Originally Posted By: tig1
Why 9K OCIs?


Yea, why 9k? Seems like such a random number.
_________________________
2014 Mazda 3 Hatch 2.0L & 6spd - Idemitsu 0w20 Synthetic @ $0.75 a quart.

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#4694111 - 03/13/18 11:24 PM Re: Amsoil ASL 5w30, 9K, 04 Chevy Tahoe, 233K [Re: dhellman12]
dhellman12 Offline


Registered: 08/29/11
Posts: 239
Loc: Texas
Lead spikes every other OCI. Until those come down Iíve been following the Blackstone recommendations of no more than 9K. Based on this last one it looks like they now are ok pushing it to 10-11K.
_________________________
05 Kawasaki BF750 - 262hrs
04DMax 6.6L - Amsoil AME 15w40 222K
04Tahoe 5.3L - Amsoil ASL 5w30 235K
00WS6 5.7L - Amsoil ASL 5w30 253K

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#4694115 - 03/13/18 11:29 PM Re: Amsoil ASL 5w30, 9K, 04 Chevy Tahoe, 233K [Re: dhellman12]
dblshock Offline


Registered: 04/24/07
Posts: 2602
Loc: WI.
that's long for W-30
_________________________
16 Civic Coupe Touring
640:1 TCW-3 E091
Edge 0/40/XG7317
Firehawk Indy 500

06 4Runner SR5 135k
640:1 TCW-3
M1 0/40 XG3614
Falken Wildpeak AT3W

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#4694182 - 03/14/18 02:55 AM Re: Amsoil ASL 5w30, 9K, 04 Chevy Tahoe, 233K [Re: dhellman12]
zeng Offline


Registered: 09/01/15
Posts: 2148
Loc: Malaysia
Originally Posted By: dhellman12
Lead spikes every other OCI. Until those come down Iíve been following the Blackstone recommendations of no more than 9K. Based on this last one it looks like they now are ok pushing it to 10-11K.

9K OCI is giving you very low metal wear rates in Fe, Cu.
Residual KV100C and TBN reads good, I would concur with BStone extending OCI further as suggested as I see this Amsoil can do more.

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