Oil Analysis--2nd is Better

[M&EM]

Just got back second Blackstone oil analysis after 2430 miles on oil and adding 1 quart make up oil. It appears that this time my readings are being compared to a "unit location average" instead of "universal averages"

Not only does the value of copper read last time fall within the unit averages, but this times reading was lower still.

The only difference in oil changes was less miles by half. 4900 miles last and 2400 miles this time.

The following is the attached narrative from Blackstone.

"MARTIN: It should be noted that the copper in GM engines tends to linger up to about ~45K miles. Your
level decreased by 17 ppm and should follow that same trend in the future. Your wear rate was a smidgeon
higher than averages, but that doesn't mean there is a problem. Insolubles were normal at 0.3% showing
good oil filtration and complete combustion. We didn't see any varnishy gray quality exhibited in the last
sample this time around. No fuel dilution, water, or coolant contamination was found. Check back to
monitor. Nice overall improvement."

[M&EM]

Just got back second Blackstone oil analysis after 2430 miles on oil and adding 1 quart make up oil. It appears that this time my readings are being compared to a "unit location average" instead of "universal averages"

Not only does the value of copper read last time fall within the unit averages, but this times reading was lower still.

The only difference in oil changes was less miles by half. 4900 miles last and 2400 miles this time.

The following is the attached narrative from Blackstone.

"MARTIN: It should be noted that the copper in GM engines tends to linger up to about ~45K miles. Your
level decreased by 17 ppm and should follow that same trend in the future. Your wear rate was a smidgeon
higher than averages, but that doesn't mean there is a problem. Insolubles were normal at 0.3% showing
good oil filtration and complete combustion. We didn't see any varnishy gray quality exhibited in the last
sample this time around. No fuel dilution, water, or coolant contamination was found. Check back to
monitor. Nice overall improvement."

[DriVer]

Having Blackstone as a resource is great! Education and fact about what's going on under the valve covers is in my opinion a good thing to know.