Cold Cranking Simulator Viscosity Boosting Base Stocks and Lubricating Oil Formulations Containing the Same

A method for determining boosting efficacy of a first base stock in boosting the cold crank simulator viscosity at a given temperature as determined pursuant to ASTM D5293 (“CCSV”) of a lubricating oil formulation comprising the first base stock and a reference oil, the method comprising:

• determining the kinematic viscosity at 100° C. as determined pursuant to ASTM D2245 (“KV100”) of the reference oil;
• determining the CCSV of the reference oil;
• determining the KV100 of a mixture oil consisting of the first base stock and the reference oil at a first concentration of the first base stock based on wthe total quantity of the mixture oil;
• determining the CCSV of the mixture oil;
• and
• determining the first base stock as not a CCSV-boosting base stock if the CCSV of the mixture oil is smaller than the CCSV of the reference oil.