http://www.axishistory.com/index.php?id=5275
snipped;
"In addition, the Russians got about 351.700 trucks and 78.000 Jeeps from the USA. With this the Red Army became more movable as mobility increased."
"The vast quantities of American trucks with USA serials provided, were so common in Eastern Europe in 1944/45, that common folk-lore interpreted the stenciled letters as Ubiyat Sukinsyna Adolfa - Kill that Son-of-a-***** Adolf."
http://orbat.com/site/sturmvogel/SovLendLease.html
Lend lease provided 59% of the Soviet union's aviation fuel and 55% of the aluminum that the Soviets used to build their air force, What was critical were the Machine tools.
War is more then shooting things and blowing stuff up. War is a political act, which means you have economic, moral and cultural considerations also.