[nesslar]

Not my post originally, but......

Originally Posted by db_cooper

I will add this to the thread that will not die. Below is a cut and paste from bobistheoilguy.com.

It looks like the John Deere Tractor oil (plus 50) has a big add package, 1700+ zinc and 1400+ phosphorus plus some moly for good measure. This fellow runs it in a boat. The oil looks very suitable for our air cooled engines. A plus would be, we can get this oil at any John Deere store.

Any thoughts?


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.................<1
silver.............<.1
titanium............<1
silicon............. 4
boron..............133
sodium.............. 5
potassium..........<10
moly...............139
phosphorous.......1410
zinc..............1723
calcium...........4102
barium.............<10
magnesium...........15
antimony...........<30
vanadium............<1
fuel %vol...........<1
t/s %vol...........0.5
water %vol.........<.1
vis cs 100`c....... 15

oilscan doesn't offer tbn/tan to my knowledge, but this engine has always returned stellar uoa's