Russian military trucks Not sure if this is the correct section... Myself and a group of others run Russian military vehicles, Zil’s, URAL, GAZ etc which were designed in the Soviet Union in the ‘60’s and ‘70’s (see Zil131.com). My interest is in the Zil 131, a 7.5 tonne 6x6 with a 6 litre push rod, low speed, low compression 150 Kw petrol engine and which uses a centrifugal filter (which spins on long after the engine stops!). These robust trucks were designed for extreme climatic conditions from -55 Celsius to +55 Celsius using the prevalent Russian oils and greases but the question often arises, what are the modern western equivalents or alternatives available today. For example, anecdotally it is said that the Zil 131 engine has wider tolerances than modern (Western) engines and therefore higher viscosity engine oil should be used. One user has also observed low oil pressure when using low viscosity oil whereas I would suggest that the very best oil would be 0W50 which would be happy in the Libyan Sahara in summer and Chucotka in winter! I wonder if you guys might have some definitive advice for us. Any help would be very much appreciated. These are the oils and greases the Russian manuals specify using the Soviet Union standards:- AC-8 Oil - Used in crankcase, engine air cleaner and crankcase air cleaner T146 Automotive Transmission Fluid - Used in Gear box, transfer case, difs, axle drive prop, walking Beam Suspension hubs, steering column prop YC1 Grease or Press Solid C - Used in clutch release fork, clutch pedal shaft, splines of axle prop or Grade C Steering rod hinged joints, spring bolts, worm gear wheel brake adjuster lever, expansion cam shafts of wheel brakes, pintle hook stem 58 R-H32 Grease or GOST 9432-60 - Bearings on water pump, bearings on fan, distributor drive or GOST 1-13C shaft, splines of steering column, bearings of wheel hub Oil Grad P or Turbine oil22 - Hydraulic booster or GOST 32-55 Spindle Oil or GOST 1642-50 - telescopic shock absorber One other matter, these trucks are acquired mostly from ex. Warsaw pact army conservation centres and although have very low Km’s (some as low as 500 Km’s) they will have been stored for up to 30 years and experienced 30 hot summers and 30 cold winters with only the occasional run around the depot and only if they are lucky will they have had an oil change during that time. What advice can you give in regard of remedial treatments under such circumstances? Cheers.