Here is the latest report on my 1998 Dodge/Cummins 24 valve 5.9L diesel engine, and the first run of Schaeffer's Supreme 7000 15W-40 synthetic blend.
Miles on sample: 14,301
Miles on engine: 139,276
Time of use: early March '05 - 09/21/05
Sump capacity: 11 quarts
Oil filter: Fleetguard StrataPore LF3894
Air filter: Fleetguard cylindrical paper AH19037 w/an Outerwears pre-filter
Fuel: predominantly Amoco Priemier(50 cetane) with blends of up to 50% bio-diesel
Lab: Blackstone
Aluminum - 2
Chromium - 1
Iron - 16
Copper - 2
Tin - 1
Moly - 78
Boron - 6
Silicon - 3
Calcium - 3106
Magnesium - 42
Phosphorus - 1021
Zinc - 1235
Elements not listed = 0
SUS viscosity @ 212F - 78.3
Flash point - 425F
Fuel - Insolubles - 0.4%
TBN - 8.3
As I have done in the past, I changed the oil filter at around 10K miles and added 1 1/2 quarts make-up oil at that time. This Schaeffer's contains 20-25% PAO, and thus far has shown the least ppm wear per 1,000 miles of operation than anything else I've used. That's included Amsoil 15W-40 and Delvac 1. The cost of Schaeffer's was $2.92 per quart delivered, far less than the full synthetics I was using.
The engine on this interval was stock HP/Torque, 235/460. I installed 275HP injectors this weekend, and the current oil fill is Schaeffer's Supreme 9000 5W-40 for the winter months.
Miles on sample: 14,301
Miles on engine: 139,276
Time of use: early March '05 - 09/21/05
Sump capacity: 11 quarts
Oil filter: Fleetguard StrataPore LF3894
Air filter: Fleetguard cylindrical paper AH19037 w/an Outerwears pre-filter
Fuel: predominantly Amoco Priemier(50 cetane) with blends of up to 50% bio-diesel
Lab: Blackstone
Aluminum - 2
Chromium - 1
Iron - 16
Copper - 2
Tin - 1
Moly - 78
Boron - 6
Silicon - 3
Calcium - 3106
Magnesium - 42
Phosphorus - 1021
Zinc - 1235
Elements not listed = 0
SUS viscosity @ 212F - 78.3
Flash point - 425F
Fuel - Insolubles - 0.4%
TBN - 8.3
As I have done in the past, I changed the oil filter at around 10K miles and added 1 1/2 quarts make-up oil at that time. This Schaeffer's contains 20-25% PAO, and thus far has shown the least ppm wear per 1,000 miles of operation than anything else I've used. That's included Amsoil 15W-40 and Delvac 1. The cost of Schaeffer's was $2.92 per quart delivered, far less than the full synthetics I was using.
The engine on this interval was stock HP/Torque, 235/460. I installed 275HP injectors this weekend, and the current oil fill is Schaeffer's Supreme 9000 5W-40 for the winter months.