4K mile GC UOA

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Nov 10, 2003
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okay, hre it goes. i only did 4K miles this interval rather than the recommended 6K odd mile from blackstone labs on my last sample. reason i did this was to try and give some sort of comparison (although i admit very little) between the two samples. however, even though both samples have the same mileage,the latter was pushed harder due to more idling time and full throttle acceleration to get on interstates and lots of 90 mph cruising speeds.

I must say that I used a genuine VW Langzeit filter (long-life) and the last sample i used a supertech filter for the first 2K miles and a purolator pure one the last 2K miles. I say this because it seems as though the filters did well. anyways, here it is.....
recent universal last sample
time on oil: 4,000 average 4,200 miles
52,000 34,000

Aluminium: 2 3 4
chromium: 0 1 0
Iron: 9 14 16
Copper: 3 7 13
lead: 1 4 1
Tin: 0 0 0
Molybdenum: 2 41 15
Nickel: 0 1 1
Manganese: 0 1 1
Silver: 0 0 0
Titanium: 0 0 0
Potassium: 0 0 0
Boron: 0 0 0
Silicon: 9 8 6
sodium: 2 2 1
Calcium: 2836 2443 2679
Magnesium: 179 168 87
Phosphorus: 743 762 787
Zinc: 964 912 911
Barium: 0 0 0

Viscosity: SUS
values should be 58-65
values are 63.9
TBN= 3.7
 
Which numbers are the one with GC?
frown.gif
 
so, should i stay w/ GC or continue trying the M! 5w-40 that i just put in? Im thinking next time, im going back to GC. unless M1 5w-40 comes back w/ awesome numbers.
 
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