1996 Chevrolet Caprice LT1 Running Supertech 5W30 6889 and 8291 Miles

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The first sample was 4 Qts Supertech 5W30, 1 Qt Rislone, then 1 qt of Supertech 5W30 top-off.
The second sample was 5 Qts Supertech 5W30, with 1 Qt of GC used as top-off.
All Supertech was SL.
My driving to work consists of a 2 mile street transit, a 9 mile interstate trip, then a 2 mile street transit.

  • Date 5/23/2004 11/12/2004
    Hr Unit 79218 87509
    Hr Oil 6889 8291
    Copper 10 12
    Iron 37 34
    Chromium 3 3
    Aluminum 13 9
    Lead 16 14
    Moly 10 10
    Phosphorous 910 1026
    Zinc 1040 1214
    Magnesium 34 46
    Calcium 2061 2696
    Sodium NR NR
    Potassium NR NR
    Antifreeze % 0 0
    Fuel Dilution N N
    % H20 0.2 0
    Silicon 44 43
    Viscosity CST 9.31 10.07
    ISO 30WT 30WT
    Sulfur 10 0
    Oxidation 17 24
    Nitration 20 30

NR Means "No Remark."
N Means "N".
 
My previous UOA was discussed in this thread:
http://theoildrop.server101.com/cgi/ultimatebb.cgi?ubb=get_topic;f=3;t=001182#000000

The old UOA was:
Mileage on Oil: 4,120
Mileage on Unit: 72329
Date: 01/01/2004
Make-Up: It got maybe 3/4 of a quart below full line before oil change time, but no top-off was done.
Data Points: Left side is mine, right side is universal averages
Alumimum: 5 / 8
Chromium: 2 / 2
Iron: 21 / 24
Copper: 6 / 28
Lead: 10 / 11
Tin: 1 / 2
Moly: 4 / 32
Nickel: 1 / 1
Manganese: 1 / 1
Silver: 0 / 0
Titanium: 0 / 0
Potassium: 0 / 0
Boron: 0 / 50
Silicon: 31 / 21 CONCERN HERE
Sodium: 21 / 8 CONCERN HERE
Calcium: 1657 / 1217
Magnesium: 32 / 744
Phosphorous: 714 / 754
Zinc: 850 / 908
Barium: 0 / 0
SUS Viscosity @ 210 Fahrenheit: 57.9 / 54-61
Flashpoint: 375 / >365
Fuel: < .5 / < 2.0
Antifreeze: ? / 0
Water: 0.0% / Insolubles: .5% / <.6%
 
My biggest concern here is the silicon.
My sillicon started at 31, went to 44, then went to 43.
Blackstone claims 21 is the "Universal Average" for Si in this motor.
Expressed on an Si PPM per 1,000 miles basis, this works out to 7.4, then 6.4 and finally 5.2.
On a PPM/1000 basis, my sillicon problem is getting better, but I just don't like Si in the 30s and 40s. I also have questions about the PPM/1000 methodology, since it seems that many wear numbers appear almost instantly when your oil is changed, as we see from the Paradise Garage Synthetic Oil Life Study.
In case anyone is curious, I have a conventional Fram air filter in place. My air cleaner housing was damaged in a motor vehicle accident occurring shortly after I got the vehicle, and the body shop replaced the housing.
Any thoughts? My inclination is to ask the body shop to double-check their work and the parts involved. They are also my garage, and we have a good relationship.
 
Your on the right track. Something is not sealing properly. The Fram should be ok, if is sealing properly. Definitely have 'em check it out. Silicon and lead should come way down when the source of the leak is repaired.
 
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