Here is my first UOA for my pickup. I did this mainly to check for a leaking gasket so common in these engines. I thought the wear looks good, but I am concerned about the amount of sodium. I bought this truck used, ran it on 2 oci's of Kendal Syn blend, then Valvoline Syn blend, gtx, 2 Mobile 1 10W-30 High milage, then this was my second oci of PP. Do you think it's still cleaning out sodium from previous oil? I am having another analysis done on this fill of PP. This winter it started ticking at startup, and will do so until there is some heat in the engine. Then it runs like a charm. Hopefully it is just piston slap. I ran this Oci mostly 6 miles to work each way weekly, then on weekends 100 miles to the mountians where I drove lots of mountain roads which were rocky dirt paths for hunting, and hauled a full truck load of fire wood home. Oil filter was a P1, PL24011. Please let me know what you think!
FOSTER: Your Silverado's V-8 appears to be wearing well at 171,932 miles. Our universal averages show
typical wear for the 5.7L after 3,400 miles of oil use. You ran this 5W/30 oil 3,141 miles and all wear metals
read below those averages. They were also in balance to one another and that indicates nicely wearing
parts. Insolubles, which are oxidized solids caused by heat, use, and blow-by, read low at 0.3%, showing
good oil filtration and no combustion problems. No contaminants were found. Try ~4,000 miles and check
back to establish engine wear trends.
Aluminum.....2
Chromium.....1
Iron.........4
Copper.......2
Lead.........2
Tin..........0
Molybdenum..90
Nickel.......0
Manganese....0
Silver.......0
Titanium.....0
Potassium....4
Boron.......39
Silicon.....13
Sodium......56
Calcium...3013
Magnesium...13
Phosphorus.712
Zinc.......915
Barium.......0
SUS Viscosity @ 210F 61.0
cSt Viscosity a 100C 10.50
Flashpoint F 430
Fuel% Antifreeze% 0.0
Water % 0.0
Insolubles% 0.3
FOSTER: Your Silverado's V-8 appears to be wearing well at 171,932 miles. Our universal averages show
typical wear for the 5.7L after 3,400 miles of oil use. You ran this 5W/30 oil 3,141 miles and all wear metals
read below those averages. They were also in balance to one another and that indicates nicely wearing
parts. Insolubles, which are oxidized solids caused by heat, use, and blow-by, read low at 0.3%, showing
good oil filtration and no combustion problems. No contaminants were found. Try ~4,000 miles and check
back to establish engine wear trends.
Aluminum.....2
Chromium.....1
Iron.........4
Copper.......2
Lead.........2
Tin..........0
Molybdenum..90
Nickel.......0
Manganese....0
Silver.......0
Titanium.....0
Potassium....4
Boron.......39
Silicon.....13
Sodium......56
Calcium...3013
Magnesium...13
Phosphorus.712
Zinc.......915
Barium.......0
SUS Viscosity @ 210F 61.0
cSt Viscosity a 100C 10.50
Flashpoint F 430
Fuel% Antifreeze% 0.0
Water % 0.0
Insolubles% 0.3
