Changed when OLM at 0. Tow 10k lb. trailer for over 1000 of these miles. I push pretty hard over the mountain passes. Quite a bit of slow off road driving on hunting trips for this OCI also. Have KN cold air intake. This truck is used mostly for hunting, camping, hauling, not daily driver.
Are lead and iron numbers a concern for this usage and miles on motor? Should I try a 5w40 HDEO? Current fill is M1 5w30 T&SUV.
Blackstone Analysis
"Iron, from steel parts, was higher than the universal averages for this type of GM engine (which are based on a ~4,000-mile oil change interval) and might be a sign of some excess wear. Lead, from bearings, was also higher than average but not at a cautionary level. Both may be due to your Chevy's engine showing its age at 162,830 miles or it could be from something operational like towing or hauling heavy loads. The TBN was 4.6, showing lots of active additive left. All else looked good. Try another 4k-mile oil run and check back to monitor before extending oil use."
M on oil 4004
M on unit 162,830
Sample Date 2/9/08
Make up 1qt
This Analysis and Univ Avg
Aluminum 5 3
Chromium 0 0
Iron 29 13
Copper 5 11
Lead 20 13
Tin 1 1
Molybdenum 84 61
Nickel 1 1
Manganese 5 1
Silver 0 0
Titanium 0 0
Potassium 2 1
Boron 50 43
Silicon 6 13
Sodium 5 6
Calcium 2545 2215
Magnesium 14 69
Phosphorus 628 721
Zinc 794 890
Barium 0 0
SUS Visc @210F 62.5
cST Visc @100C 10.93
Flashpoint F 405
Fuel % Antifreeze % 0.0
Water % 0.0
Insolubles % 0.4
TBN 4.6
Are lead and iron numbers a concern for this usage and miles on motor? Should I try a 5w40 HDEO? Current fill is M1 5w30 T&SUV.
Blackstone Analysis
"Iron, from steel parts, was higher than the universal averages for this type of GM engine (which are based on a ~4,000-mile oil change interval) and might be a sign of some excess wear. Lead, from bearings, was also higher than average but not at a cautionary level. Both may be due to your Chevy's engine showing its age at 162,830 miles or it could be from something operational like towing or hauling heavy loads. The TBN was 4.6, showing lots of active additive left. All else looked good. Try another 4k-mile oil run and check back to monitor before extending oil use."
M on oil 4004
M on unit 162,830
Sample Date 2/9/08
Make up 1qt
This Analysis and Univ Avg
Aluminum 5 3
Chromium 0 0
Iron 29 13
Copper 5 11
Lead 20 13
Tin 1 1
Molybdenum 84 61
Nickel 1 1
Manganese 5 1
Silver 0 0
Titanium 0 0
Potassium 2 1
Boron 50 43
Silicon 6 13
Sodium 5 6
Calcium 2545 2215
Magnesium 14 69
Phosphorus 628 721
Zinc 794 890
Barium 0 0
SUS Visc @210F 62.5
cST Visc @100C 10.93
Flashpoint F 405
Fuel % Antifreeze % 0.0
Water % 0.0
Insolubles % 0.4
TBN 4.6