1986 Ford F-250HD 4x4, 6.9L diesel (Banks Turbo Kit since '87)
Current Miles: 134,502
OCI: 6,000/1-yr
Actual OCI: 5,302/1-yr
Oil Used: 15W40 Rotella-T CJ-4
Oil Filter: Wix 51734 (Powerstroke oversize)
(Universal averages for 3250 mile OCI in parenthesis)
TBN: 9.9
Alum: 4 (5)
Chrom: 4 (3)
Iron: 46 (42)
Copper: 2 (6)
Lead: 4 (1)
Moly: 4 (55)
Potassium: 3 (5)
Boron: 2 (60)
Silicon: 5 (7) (Note- Has K&N Filter)
Sodium: 5 (18)
Calcium: 4059 (2945)
Magnesium: 11 (211)
Phosphorus: 1121 (1126)
Zinc: 1378 (1369)
SUS @ 210: 86.8 (69-78)
Flash: 405 (>415)
Fuel: 1.0 ( Insol: 0.4 (
Comments from Blackstone: "The 6.9L that powers your 1986 Ford is looking good at 134,502 miles after it's annual oil change. The universal averages for typical wear metals in oil from this type of IH diesel are based on a 3250 OCI. You engine's wear metals match up quite well to those in the universal files indicating normal wearing parts and careful operation of this F250HD truck. 1.0% of this sample was fuel but it didn't hurt anything. The TBN was 9.9, plenty of active additive left in the oil. The viscosity was high due to soot."
My Comments: The only thing that jumps out to me is the viscosity and soot. It was near to a 50 weight! Blackstone seems unconcerned. I had analysis done elsewhere some years back, and the oil also thickened up, but not this much. But then I was doing 4K changes. Comments?
Current Miles: 134,502
OCI: 6,000/1-yr
Actual OCI: 5,302/1-yr
Oil Used: 15W40 Rotella-T CJ-4
Oil Filter: Wix 51734 (Powerstroke oversize)
(Universal averages for 3250 mile OCI in parenthesis)
TBN: 9.9
Alum: 4 (5)
Chrom: 4 (3)
Iron: 46 (42)
Copper: 2 (6)
Lead: 4 (1)
Moly: 4 (55)
Potassium: 3 (5)
Boron: 2 (60)
Silicon: 5 (7) (Note- Has K&N Filter)
Sodium: 5 (18)
Calcium: 4059 (2945)
Magnesium: 11 (211)
Phosphorus: 1121 (1126)
Zinc: 1378 (1369)
SUS @ 210: 86.8 (69-78)
Flash: 405 (>415)
Fuel: 1.0 ( Insol: 0.4 (
Comments from Blackstone: "The 6.9L that powers your 1986 Ford is looking good at 134,502 miles after it's annual oil change. The universal averages for typical wear metals in oil from this type of IH diesel are based on a 3250 OCI. You engine's wear metals match up quite well to those in the universal files indicating normal wearing parts and careful operation of this F250HD truck. 1.0% of this sample was fuel but it didn't hurt anything. The TBN was 9.9, plenty of active additive left in the oil. The viscosity was high due to soot."
My Comments: The only thing that jumps out to me is the viscosity and soot. It was near to a 50 weight! Blackstone seems unconcerned. I had analysis done elsewhere some years back, and the oil also thickened up, but not this much. But then I was doing 4K changes. Comments?