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#4606149 - 12/17/17 11:07 AM UOA 08 Corvette Z06 LS7 - After upgrading heads
randomhero439 Offline


Registered: 07/21/12
Posts: 1287
Loc: ohio
Hello All!

I recently upgrade the heads on my C6Z to get rid of the valve guide problem that plagues these cars on the OEM heads. I removed my OEM heads, sent them to American Heritage Performance in Cali. They cleaned them, put in new hardened powdered metal valve guides, new steel exhaust valves, new intake & exhaust valve springs. The heads were also ported and decked. Installed with new gaskets. I changed the oil after driving the car for 20 minutes, oil temp was about 160F which is normal operating temp for the car. The car brand new Airaid intake on it with an oiled filter. Oil filter was a ACDelco. Driving style is aggressive. I drive it pretty hard every time I get in it. Saw maybe 20 passes at a drag strip too. Below is the oil analysis of the oil change before putting it into storage. Refilled with Mobil 1 5w-30 EP and a Mobil 1 filter

Code:
Make/Model	GM LS7 7.0L V8
Fuel		Top Tier 93
Add.		Corvette Z06
Oil used	Mobil 1 5w-30	Universal Average
Miles on Oil	1,654		2,900	
Miles on unit	49,486
Sample Date	11/23/2017

Aluminum		7	4
Chromium		2	1
Iron			39	32
Copper			2	5
Lead			3	7
Tin			1	1
Molybdenum		85	106
Nickel			1	1
Manganese		1	2
Silver			0	0
Titanium		11	2
Potassium		1	3
Boron			88	87
Silicon			6	10
Sodium			5	14
Calcium			941	1956
Magnesium		757	364
Phosphorus		705	790
Zinc			789	913
Barium			0	0

cST Visc @ 100C		10.71
Flashpoint		415F
Fuel			<0.5%
Antifreeze		0
Water			0
Insolubles		0.2


Code:
BlackStone Comments: Thanks for the notes. Depending on when you changed out the heads, valves, and springs & guides,
some of this may still be wear-in material. It usually takes at least a couple oil changes for most of that
material to wash out. Iron is high on a per-mile basis since averages are based on a longer oil change
interval of 2,900 miles. It shows wear at steel parts -- maybe the exhaust valves. Titanium is also up and
can come from connecting rods or intake valves. If this is related to wear-in, then there should be progress
next time. Use 1,500 miles again and check back.


Edited by randomhero439 (12/17/17 11:08 AM)
_________________________
'03 Accord V6-6MT: M1EP 0w-20, daily
'10 Mercedes GLK: M1 0w-40, wife's car
'00 S2000: M1 0w-40, track car
'08 Corvette Z06: M1EP 5w-30, summer daily


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#4606429 - 12/17/17 04:53 PM Re: UOA 08 Corvette Z06 LS7 - After upgrading heads [Re: randomhero439]
CT8 Offline


Registered: 10/09/14
Posts: 10925
Loc: Idaho
The most important thing,,, forget the UOA how does the car run now ?
_________________________
"Don't let your preconceived notions get in the way of facts."
Geoff Metcalf

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#4606436 - 12/17/17 04:58 PM Re: UOA 08 Corvette Z06 LS7 - After upgrading heads [Re: randomhero439]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
Originally Posted By: randomhero439
Refilled with Mobil 1 5w-30 EP and a Mobil 1 filter


As soon as I read that I thought, "uh oh, Iron is going to be up there." I was right.

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#4606709 - 12/17/17 09:17 PM Re: UOA 08 Corvette Z06 LS7 - After upgrading heads [Re: Merkava_4]
randomhero439 Offline


Registered: 07/21/12
Posts: 1287
Loc: ohio
Originally Posted By: CT8
The most important thing,,, forget the UOA how does the car run now ?


Ha! Runs strong. Sounds good. Rips off a consistent 11.9 @ 122mph on Runflats.
Originally Posted By: Merkava_4
Originally Posted By: randomhero439
Refilled with Mobil 1 5w-30 EP and a Mobil 1 filter


As soon as I read that I thought, "uh oh, Iron is going to be up there." I was right.


Iíve been thinking about switch to Pennzoil Ultraa Platinum for my Accord and vette. What do you think?
_________________________
'03 Accord V6-6MT: M1EP 0w-20, daily
'10 Mercedes GLK: M1 0w-40, wife's car
'00 S2000: M1 0w-40, track car
'08 Corvette Z06: M1EP 5w-30, summer daily


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#4606756 - 12/17/17 10:16 PM Re: UOA 08 Corvette Z06 LS7 - After upgrading heads [Re: randomhero439]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
Originally Posted By: randomhero439
Iíve been thinking about switch to Pennzoil Ultraa Platinum for my Accord and vette. What do you think?


I think that would be a good idea yes.

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#4610379 - 12/21/17 03:51 PM Re: UOA 08 Corvette Z06 LS7 - After upgrading heads [Re: Merkava_4]
CT8 Offline


Registered: 10/09/14
Posts: 10925
Loc: Idaho
Originally Posted By: Merkava_4
Originally Posted By: randomhero439
Iíve been thinking about switch to Pennzoil Ultraa Platinum for my Accord and vette. What do you think?


I think that would be a good idea yes.
Why would you think it would be a good idea Merk? Splain your self?
_________________________
"Don't let your preconceived notions get in the way of facts."
Geoff Metcalf

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#4610593 - 12/21/17 07:52 PM Re: UOA 08 Corvette Z06 LS7 - After upgrading heads [Re: randomhero439]
irv Offline


Registered: 10/08/06
Posts: 1050
Loc: Oshawa, Ont. Canada
Originally Posted By: randomhero439
Originally Posted By: CT8
The most important thing,,, forget the UOA how does the car run now ?


Ha! Runs strong. Sounds good. Rips off a consistent 11.9 @ 122mph on Runflats.
Originally Posted By: Merkava_4
Originally Posted By: randomhero439
Refilled with Mobil 1 5w-30 EP and a Mobil 1 filter


As soon as I read that I thought, "uh oh, Iron is going to be up there." I was right.


Iíve been thinking about switch to Pennzoil Ultraa Platinum for my Accord and vette. What do you think?


Seeing these higher than normal wear metals in many previous Mobil-1 UOA's back about 4-5 years ago was enough for me to switch to Pennzoil Platinum. I used nothing bu Mobil back then.
Surprising, as I recently just started frequenting the forum again, that these same typical UOA's still exist?


Edited by irv (12/21/17 07:52 PM)
_________________________
2017 Chevy Impala 3.6 Ltr.
2013 Ram Hemi Bighorn QC 4x4
PP and/or PUP for both vehicles.

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#4611272 - 12/22/17 01:13 PM Re: UOA 08 Corvette Z06 LS7 - After upgrading heads [Re: irv]
deven Offline


Registered: 06/28/05
Posts: 3399
Loc: Massachusetts
Originally Posted By: irv
Originally Posted By: randomhero439
Originally Posted By: CT8
The most important thing,,, forget the UOA how does the car run now ?


Ha! Runs strong. Sounds good. Rips off a consistent 11.9 @ 122mph on Runflats.
Originally Posted By: Merkava_4
Originally Posted By: randomhero439
Refilled with Mobil 1 5w-30 EP and a Mobil 1 filter


As soon as I read that I thought, "uh oh, Iron is going to be up there." I was right.


Iíve been thinking about switch to Pennzoil Ultraa Platinum for my Accord and vette. What do you think?


Seeing these higher than normal wear metals in many previous Mobil-1 UOA's back about 4-5 years ago was enough for me to switch to Pennzoil Platinum. I used nothing bu Mobil back then.
Surprising, as I recently just started frequenting the forum again, that these same typical UOA's still exist?


Mobil does a better job of scrubbing the engine and keeping it clean that is why the iron numbers are typically higher than the rest of the awesome oils out there.....
_________________________
Proud user of ROYAL PURPLE products!

2016 Acura RLX Sports Hybrid(Royal Purple HPS 5w30 + M1-110 oil filter)

KEEP IT SIMPLE STUPID. IT'S ONLY OIL

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