i know we usually go over automotive uoa's here, but i wanted to throw this one into the mix, to show why i use john deere plus 50 motor oil.
the engine is a john deere marine 6076 (466) with 9798 hrs. engine is either run at wot or idle (lots of idle time, probably 30-40%) i have samples dating back to '92 on this particular engine, i'm only going to post most recent.
sample has 254 hrs., i generally run this oil to 350 hrs., but boat is layed-up until mid-april and i always put her to bed with fresh fluids
oil; john deere plus 50 15w-40
oilscan; through deere
sample date; 12/5/09
make-up oil; 10 qts (due to extensive ideling, hasn't changed since new)
iron................28
chromium............ 1
nickel.............. 1
aluminum............ 2
lead................ 1
copper.............. 1
tin................. silver............. titanium............ silicon............. 4
boron..............133
sodium.............. 5
potassium.......... moly...............139
phosphorous.......1410
zinc..............1723
calcium...........4102
barium............. magnesium...........15
antimony........... vanadium............ fuel %vol........... t/s %vol...........0.5
water %vol......... vis cs 100`c....... 15
oilscan doesn't offer tbn/tan to my knowledge, but this engine has always returned stellar uoa's
the engine is a john deere marine 6076 (466) with 9798 hrs. engine is either run at wot or idle (lots of idle time, probably 30-40%) i have samples dating back to '92 on this particular engine, i'm only going to post most recent.
sample has 254 hrs., i generally run this oil to 350 hrs., but boat is layed-up until mid-april and i always put her to bed with fresh fluids
oil; john deere plus 50 15w-40
oilscan; through deere
sample date; 12/5/09
make-up oil; 10 qts (due to extensive ideling, hasn't changed since new)
iron................28
chromium............ 1
nickel.............. 1
aluminum............ 2
lead................ 1
copper.............. 1
tin................. silver............. titanium............ silicon............. 4
boron..............133
sodium.............. 5
potassium.......... moly...............139
phosphorous.......1410
zinc..............1723
calcium...........4102
barium............. magnesium...........15
antimony........... vanadium............ fuel %vol........... t/s %vol...........0.5
water %vol......... vis cs 100`c....... 15
oilscan doesn't offer tbn/tan to my knowledge, but this engine has always returned stellar uoa's