A 1995 Belarus 1770 tractor followed me home. i have been familiarizing myself with the overall machine and am preparing to change all of the oils in it before it goes to work. i found a book for the tractor translated into english and have been working my way through the oil specs. interesting is the specs in the book are written for russian oil specs of M10B or M101 and M81 oils and also give a mil spec of mil-L-45199 and MIL-L-2104B for use in the transmission and engine crankcase. there is also a spec for shell rimula 30 or shell rotella oil 30 for both the transmission and engine all oils are spec for 30 or 40 weight. the transmission is the spur gear type with 4 powershift clutches. the engine is a smd-63 v6 turbo diesel of russian origin but built in the ukraine. i have reached out to some others for their experiences with the 1770 models and the T 150K as it is designated in other parts of the world. interesting to find that most in the USA are having good service from their tractors but a few had engine or more rarely transmission issues. the technology in this tractor seems to be pretty simple and the metallurgy are probably of less than domestic machines. now for the oil question???? do you think this tractor would service better with older mono grade oils in the specs or from more modern multigrade oils? these tractors seem to just last forever in those parts of the world where the grades of fuel and lubes leave allot to be desired.