This run was after a little over a year in the engine, oil was drained and replaced at time of sample. This vehicle is used as a cattle feed truck at a ranch in central texas, bed has a feed hopper installed. Unless driven to the feed store to refill, the vehicle rarely sees anything other than off-road use. Also had a compression test done recently with results posted below.
Make/Model: GM 7.4L V-8
Vehicle: 1997 Chevy 3500 Silverado
Code:
OIL AC Delco 10w30 AC Delco 10w30
MILES IN USE 243 ?
MILES ON UNIT 118,104 117,457
SAMPLE TAKEN 8/9/13 6/15/11
MAKE UP OIL 0 0
IRON 27 47
CHROMIUM 0 2
NICKEL 4 1
ALUMINUM 6 8
COPPER 340 43
LEAD 32 10
TIN 1 0
CADMIUM 0
SILVER 0 0
VANADIUM 0
SILICON 26 15
SODIUM 140 223
POTASSIUM 984 344
TITANIUM 6 0
MOLYBDENUM 22 106
ANTIMONY 1
MANGANESE 1 1
LITHIUM 0
BORON 131 29
MAGNESIUM 57 22
CALCIUM 1165 1294
BARIUM 0 0
PHOSPHORUS 585 642
ZINC 602 776
Fuel %
Soot
Water % 0.2 0.0
Visc @ 100C 11.1 7.39
TBN 9.87
Oxidation 8
Nitration 12
SUS @ 210F 50.4
Flashpoint 320
Antifreeze % POS
Insolubles % 0.4
Current Oil analysis comments: (OAI)
Suggest INSPECTING COOLING SYSTEM (head gasket, heads, seals, EGR gaskets, etc.) for leaks. Coolant indicators (Sodium and/or Potassium) are at a SIGNIFICANT LEVEL. Suspect most of the copper may be coming from the lube cooler (as applicable); Nickel is at a MODERATE LEVEL; Water is at a MODERATE LEVEL. SILICON may be a coolant additive. Flagged data has been rechecked and confirmed. Lubricate and filter change acknowledged.
Previous oil analysis comments: (Blackstone)
The elevated potassium and sodium in this sample show this engine has some coolant seeping into the oil. Coolant usually reduces the ability of the engine oil to lubricate moving parts, and usually that causes bearing wear. Iron and copper might show the start of some bearing wear (though lead is pretty okay at this point). Aluminum typically shows wear at the pistons. Fuel read high as well, so maybe this engine has a leaky injector or other fuel problem that should be monitored. For now, watch coolant level, and keep oil changes short to minimize wear.
Compression Test Results
1# 125
2# 140
3# 135
4# 145
#5 130
#6 115
#7 140
#8 145
Make/Model: GM 7.4L V-8
Vehicle: 1997 Chevy 3500 Silverado
Code:
OIL AC Delco 10w30 AC Delco 10w30
MILES IN USE 243 ?
MILES ON UNIT 118,104 117,457
SAMPLE TAKEN 8/9/13 6/15/11
MAKE UP OIL 0 0
IRON 27 47
CHROMIUM 0 2
NICKEL 4 1
ALUMINUM 6 8
COPPER 340 43
LEAD 32 10
TIN 1 0
CADMIUM 0
SILVER 0 0
VANADIUM 0
SILICON 26 15
SODIUM 140 223
POTASSIUM 984 344
TITANIUM 6 0
MOLYBDENUM 22 106
ANTIMONY 1
MANGANESE 1 1
LITHIUM 0
BORON 131 29
MAGNESIUM 57 22
CALCIUM 1165 1294
BARIUM 0 0
PHOSPHORUS 585 642
ZINC 602 776
Fuel %
Soot
Water % 0.2 0.0
Visc @ 100C 11.1 7.39
TBN 9.87
Oxidation 8
Nitration 12
SUS @ 210F 50.4
Flashpoint 320
Antifreeze % POS
Insolubles % 0.4
Current Oil analysis comments: (OAI)
Suggest INSPECTING COOLING SYSTEM (head gasket, heads, seals, EGR gaskets, etc.) for leaks. Coolant indicators (Sodium and/or Potassium) are at a SIGNIFICANT LEVEL. Suspect most of the copper may be coming from the lube cooler (as applicable); Nickel is at a MODERATE LEVEL; Water is at a MODERATE LEVEL. SILICON may be a coolant additive. Flagged data has been rechecked and confirmed. Lubricate and filter change acknowledged.
Previous oil analysis comments: (Blackstone)
The elevated potassium and sodium in this sample show this engine has some coolant seeping into the oil. Coolant usually reduces the ability of the engine oil to lubricate moving parts, and usually that causes bearing wear. Iron and copper might show the start of some bearing wear (though lead is pretty okay at this point). Aluminum typically shows wear at the pistons. Fuel read high as well, so maybe this engine has a leaky injector or other fuel problem that should be monitored. For now, watch coolant level, and keep oil changes short to minimize wear.
Compression Test Results
1# 125
2# 140
3# 135
4# 145
#5 130
#6 115
#7 140
#8 145
