I have a rather boring UOA I thought I would share.
6076 John Deere marine engine, 250 hp version, turbocharged/intercooled.
John Deere Plus 50 II 15w-40 CJ-4
518 hrs. on sample, 13 months/12,511 hrs. total
sump capacity is 7 gallons
oil and filter were changed at time of sample
Fe..............37
Cr.............. Pb...............9
Cu...............2
Sn...............1
Al...............3
Ni...............2
Ag...............1
Ti.............. V...............
Si...............9
Na...............2
K................2
Soot %.........0.5
Water %......
Mg.............850
Ca............1363
Ba.............. P..............863
Zn.............993
Mo.............283
B..............230
Viscosity(cST 100C) 13.9
TBN...................3.6
There was approx. 3 gallon of make-up oil added over the life of the sample. This application sees roughly 60% idle time, with the 40% running at or near governed speed (2,200 rpm). Due to winter ice on the great lakes the boat is layed-up Dec.-Apr. every year. I bought this engine new in '92 and it has been the most reliable piece of equipment I have ever owned.
6076 John Deere marine engine, 250 hp version, turbocharged/intercooled.
John Deere Plus 50 II 15w-40 CJ-4
518 hrs. on sample, 13 months/12,511 hrs. total
sump capacity is 7 gallons
oil and filter were changed at time of sample
Fe..............37
Cr.............. Pb...............9
Cu...............2
Sn...............1
Al...............3
Ni...............2
Ag...............1
Ti.............. V...............
Si...............9
Na...............2
K................2
Soot %.........0.5
Water %......
Mg.............850
Ca............1363
Ba.............. P..............863
Zn.............993
Mo.............283
B..............230
Viscosity(cST 100C) 13.9
TBN...................3.6
There was approx. 3 gallon of make-up oil added over the life of the sample. This application sees roughly 60% idle time, with the 40% running at or near governed speed (2,200 rpm). Due to winter ice on the great lakes the boat is layed-up Dec.-Apr. every year. I bought this engine new in '92 and it has been the most reliable piece of equipment I have ever owned.