Oil of curiosity, following the vendor rep from valvoline, he told me the Maxlife 5w20 is rated to 10,000 miles, so I pushed it to 8800 miles and sent in for oil analysis via Wix.
Here's what they said.
2007 trailblazer lt 4.2l
188400 on test.
Code
DATE REPORTED 15-Apr-19
WO NUMBER
031118
Miles on engine 188400
Oil Change 8842
Valvoline
Maxlife Full Syn
SAE 5W20
Metals (ppm)
Iron (Fe) 32
Chromium (Cr)
Lead (Pb)
Copper (Cu)
2
Tin (Sn)
Aluminium (Al) 10
Nickel (Ni)
Silver (Ag)
Titanium (Ti)
Vanadium (V)
Contaminants (ppm)
Silicon (Si) 13
Sodium (Na) 67
Potassium (K)
Additives (ppm)
Magnesium (Mg) 401
Calcium (Ca) 1603
Barium (Ba)
Phosphorus (P) 655
Zinc (Zn) 798
Molybdenum (Mo) 13
Boron (B) 12
Contaminants
Water (%)
Coolant No
Physical Tests
Viscosity (cSt 100C) 8.4
Physical / Chemical
Base Number (mgKOH/g) 2.2
DIAGNOSIS
Engine wear levels appear satisfactory for first sample.
Silicon level (dirt/sealant material) satisfactory. Water
content acceptable. Viscosity within specified operating
range. Action: As oil and filter(s) already changed,
resample next service interval to monitor and establish
wear trend
Here's what they said.
2007 trailblazer lt 4.2l
188400 on test.
Code
DATE REPORTED 15-Apr-19
WO NUMBER
031118
Miles on engine 188400
Oil Change 8842
Valvoline
Maxlife Full Syn
SAE 5W20
Metals (ppm)
Iron (Fe) 32
Chromium (Cr)
Lead (Pb)
Copper (Cu)
2
Tin (Sn)
Aluminium (Al) 10
Nickel (Ni)
Silver (Ag)
Titanium (Ti)
Vanadium (V)
Contaminants (ppm)
Silicon (Si) 13
Sodium (Na) 67
Potassium (K)
Additives (ppm)
Magnesium (Mg) 401
Calcium (Ca) 1603
Barium (Ba)
Phosphorus (P) 655
Zinc (Zn) 798
Molybdenum (Mo) 13
Boron (B) 12
Contaminants
Water (%)
Coolant No
Physical Tests
Viscosity (cSt 100C) 8.4
Physical / Chemical
Base Number (mgKOH/g) 2.2
DIAGNOSIS
Engine wear levels appear satisfactory for first sample.
Silicon level (dirt/sealant material) satisfactory. Water
content acceptable. Viscosity within specified operating
range. Action: As oil and filter(s) already changed,
resample next service interval to monitor and establish
wear trend
Last edited: