Last time, I ran my interval a little long (9073 miles) and had a resulting increase in iron (32ppm). They chastised me a bit and recommended an 8k interval this time. Here are the results:

"We have nothing but good news to report in the latest sample from your Audi. Iron dropped nicely and all other wear remained steady, reading right around average for this type of engine. That's a very good indication that your 2.7L engine has normally wearing parts and is being operated carefully. Insolubles (mostly oil oxidation due to heat and use) were low at 0.2%, showing good oil filtration. The viscosity read well within the normal range for a 0W/40 oil and no fuel dilution or anti-freeze was present. At 68,137 total miles, this engine is doing very well."

(ppm; number in parentheses is the average):

Aluminum - 3 (3)
Chromium - 1 (1)
Iron - 18 (20)
Copper - 8 (5)
Lead - 0 (0)
Tin - 0 (0)
Moly - 62 (62)
Nickel - 0 (0)
Manganese - 0 (0)
Silver - 0 (0)
Titanium - 0 (0)
Potassium - 1 (1)
Boron - 98 (103)
Silicon - 8 (9)
Sodium - 2 (4)
Calcium - 2236 (2486)
Magnesium - 12 (29)
Phosphorous - 659 (685)
Zinc - 759 (820)
Barium - 0 (0)

SUS Viscosity - 66.7 deg. F (should be 65-76)
Flashpoint - 400 deg. F (should be > 375)
Fuel - < 0.05% (should be < 2%)
Antifreeze - 0 (should be 0)
Water - 0 (should be < 0.1%)
Insolubules - 0.2% (should be < 0.6%)

1/4 qt make-up oil added; oil was in the car 6 1/2 months

If you want to read my past analyses, they're all linked in my sig below.

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