1995 F150, 4.9L inline six, 126,200 miles with 10w40 SL Valvoline Durablend 5.5 qts and 15 oz Valvoline Synpower Oil Treatment for 3000 miles (oil is still in truck with 3450 miles now). Since I had sky high lead the last OCI I have included the numbers from the previous OCI in parenthesis for comparison (* is less than 1 ppm).
The issue is that in the previous OCI the PCV breather hose was sitting unhooked from its filter and sucking raw air while I blithely drove 20 miles per day of construction zone. Lot of sand in the air box, so I figure sand went in the breather hose too.
Lead has dropped significantly from 476 ppm to 114 ppm. That lead is still high may be due to the breather hose still being unhooked for the first 250 miles of the current OCI. Copper, tin, and iron are much lower too, so I figure the lead is residual and the next OCI should be close to normal.
What bugs me is the viscosity. I don’t doubt the viscosity of the previous OCI because I was running a thick 10w30, but the current OCI was 10w40 plus VSOT and should have been 13.9 cSt plus the VSOT. My oil pressure gauge also supports the thicker oil. (BTW, the previous OCI viscosity is slightly different from that reported in the linked VOA thread but is what is printed in the comparison on the current oil report.)
So finally, what to do? Since lead already in the oil is not going to harm the engine (hey, might help lubricate, no?), it seems reasonable to take this OCI out to 5000 miles. Or would it be wise to change it now and get a clean fill? Should I run a quick rinse with some cheap oil and a quart or two of Marvel Mystery Oil? Don’t say AutoRx because it had a double treatment and rinse already prior to the previous OCI. Prior to the AutoRx my lead was 4 ppm.
K = * (*)
V = * (*)
Moly = 202 (268) ppm
Magnesium = 129 (?) ppm
Calcium = 1665 (1681) ppm
Phosphorus = 862 (888) ppm
Zinc = 1068 (1002) ppm
Sb = * (*)
Titanium = * (*)
Silver = * (*)
Copper = 8 (13) ppm
Lead = 114 (476) ppm
Tin = 1 (12) ppm
Aluminum = 3 (6) ppm
Nickel = * (1) ppm
Iron = 8 (14) ppm
Chromium = * (1) pm
Cd = * (*)
Sodium = 14 (13) ppm
Boron = 32 (32) ppm
Silicon = 9 (12) ppm
Water = less than .05 % vol (less than .05)
Soot = less than 0.2 (0.6) %
Glycol = N (N)
Fuel = less than 0.5 (less than 0.5)
100C vis cSt = 12.61 (12.76)
_________________________
* = less than 1 ppm
The issue is that in the previous OCI the PCV breather hose was sitting unhooked from its filter and sucking raw air while I blithely drove 20 miles per day of construction zone. Lot of sand in the air box, so I figure sand went in the breather hose too.
Lead has dropped significantly from 476 ppm to 114 ppm. That lead is still high may be due to the breather hose still being unhooked for the first 250 miles of the current OCI. Copper, tin, and iron are much lower too, so I figure the lead is residual and the next OCI should be close to normal.
What bugs me is the viscosity. I don’t doubt the viscosity of the previous OCI because I was running a thick 10w30, but the current OCI was 10w40 plus VSOT and should have been 13.9 cSt plus the VSOT. My oil pressure gauge also supports the thicker oil. (BTW, the previous OCI viscosity is slightly different from that reported in the linked VOA thread but is what is printed in the comparison on the current oil report.)
So finally, what to do? Since lead already in the oil is not going to harm the engine (hey, might help lubricate, no?), it seems reasonable to take this OCI out to 5000 miles. Or would it be wise to change it now and get a clean fill? Should I run a quick rinse with some cheap oil and a quart or two of Marvel Mystery Oil? Don’t say AutoRx because it had a double treatment and rinse already prior to the previous OCI. Prior to the AutoRx my lead was 4 ppm.
K = * (*)
V = * (*)
Moly = 202 (268) ppm
Magnesium = 129 (?) ppm
Calcium = 1665 (1681) ppm
Phosphorus = 862 (888) ppm
Zinc = 1068 (1002) ppm
Sb = * (*)
Titanium = * (*)
Silver = * (*)
Copper = 8 (13) ppm
Lead = 114 (476) ppm
Tin = 1 (12) ppm
Aluminum = 3 (6) ppm
Nickel = * (1) ppm
Iron = 8 (14) ppm
Chromium = * (1) pm
Cd = * (*)
Sodium = 14 (13) ppm
Boron = 32 (32) ppm
Silicon = 9 (12) ppm
Water = less than .05 % vol (less than .05)
Soot = less than 0.2 (0.6) %
Glycol = N (N)
Fuel = less than 0.5 (less than 0.5)
100C vis cSt = 12.61 (12.76)
_________________________
* = less than 1 ppm