S10 ZR2 4.3L oil analysis

Here is the analysis that I did. I dont drive the truck much, but last analysis I saw a glycol contamination and elevated Na/K levels. This time
the Na and K levels are still a bit high, but no glycol (perhaps because of the low mileage). This was with Castrol GTX 5w-30, BTW. Filter changed because I put some Schaeffers Neutra in the oil (a non-solvent ester-type cleaning agent... Ester oils are very similar to redline,and have great cleaning properties), because on my last fill (which was a 5w-40 synth), I felt the engine was bogged down more than it should have been for a 40wt oil, and so perhaps sitting most of the time caused the oil to do some weird things. Anyway, here is the info... Extrapolating to 3000mi, the oil amount is ~ 9ppm, not bad for an OTC dino oil.
Lab Number 557419 Sample No WC-M1043308 Sample Date 6/26/2003 Unit Age 36603m Time on Fluid 1790m Time on Filter 300m Fluid Maint. Changed Filter Maint. Changed Fluid Castrol GTX 5w-30 Iron (Fe) 3.5 Chromium (Cr) 0.1 Nickel (Ni) 0.9 Titanium (Ti) 0.1 Silver (Ag) 0 Aluminum (Al) 2.6 Lead (Pb) 2.7 Copper (Cu) 1.4 Tin (Sn) 2.2 Silicon (Si) 8.5 Sodium (Na) 3.9 Potassium (K) 40 Boron (B) 1.3 Barium (Ba) 0 Molybdenum (Mo) 53 Magnesium (Mg) 12 Calcium (Ca) 2015 Phosphorus (P) 907 Zinc (Zn) 907 Sulfur (S) 3117 Cadmium (Cd) 0.2 Manganese (Mn) 0.3 Vanadium (V) 0.1 Glycol 0 Soot(%) 0 Oxidation(PA) 35 Nitratrion(PA) 20 Sulfation(PA) 13 ZDDP 0 Kv@100C 10.18 White Metal NONE Babbitt NONE Precipitate NONE Silt NONE Debris NONE Dirt NONE Appearance NORML Odor NORML H2O(Emul) NEG H2O(Free) NEG

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