Some Lubricant and Mechanical Factors Relating to Engine Hot Cranking 690547

In response to requirements of the continual trend at Pontiac Motor Div. towards development of more sophisticated engines, a comprehensive program was initiated to investigate factors pertaining to hot cranking. Results of the program were the development of laboratory and car hot crank tests, the evaluation of some of the variables affecting hot cranking, and the development of a new, specially formulated engine oil for factory fill. Data and conclusions pertaining to the study are presented.