Cold cranking simulator viscosity boosting base stocks and lubricating oil formulations containing the same

A process comprising:

• obtaining at least one of the following as a first base stock:
• a C28-C40 mono-methyl paraffin;
• and
• a linear mono-ester having the following formula R1—C(O)—O— R2, where R1 and R2 are independently each a linear, non-branched hydrocarbyl group, R1 comprises from 15-17 carbon atoms and R2 comprises from 10-12 carbon atoms, and
• using the first base stock in a lubricating oil formulation;
• wherein:
• the lubricating oil formulation has a kinematic viscosity at 100° C. as determined by ASTM D445 (“KV100”) of KV100(oil) and a cold crank simulator viscosity at a given temperature as determined pursuant to ASTM D5293 (“CCSV”) of CCSV(oil),
• a reference oil which is the remainder of the lubricating oil formulation absent the first base stock has a KV100 of KV100(ref) and a CCSV of CCSV(ref), and
• the following conditions (i), (ii), and (iii) are met:
• −20≤D(kv)=100×(KV100(oil form)−KV100(ref))/KV100(ref)≤40 (i)
• 1≤D(ccsv)=100×(CCSV(oil form)−CCSV(ref))/CCSV(ref)≤10000;
• and (ii)
• D(ccsv)/D(kv)≥4;
• and (iii)
• further exhibiting a peak in the vicinity of the temperature T1-5° C. on the DSC curve thereof in the temperature range from −60° C. to 25° C. when the oil formulation is being cooled down.

A lubricant base stock comprising at least one of the following:

• a C28-C40 mono-methyl paraffin;
• a linear mono-ester having the following formula R1—C(O)—O— R2, where R1 and R2 are independently each a linear, non-branched hydrocarbyl group, R1 comprises from 15-17 carbon atoms and R2 comprises from 10-12 carbon atoms, and
• mixtures and combinations thereof;
• wherein:
• the lubricant base stock has a kinematic viscosity at 100° C. as determined according to ASTM D445 (“KV100”) in a range from 3 to 12 cSt, and a Noack volatility as determined according to ASTM D5800 (NV) in a range from 1% to 20%;
• when combined with a Group IV base stock reference oil having a KV100 of 4.0 cSt and a CCS viscosity at a given temperature as determined pursuant to ASTM D5293 (“CCSV”) of CCSV(ref) to form a mixture oil having a concentration of the lubricant base stock at 5 wt %, the mixture oil exhibits a KV100 of KV100(mix oil) in the range from 3.2 to 5.6 cSt, where CCSV(mix oil)≥1.05*CCSV(ref), and either (i) or (ii) of the following conditions is met:
• 3.2≤KV100(mix oil)≤4.0;
• and (i)
• 4.0<KV100(mix oil)≤5.6, and D(ccsv)/D(kv)≤4.0, where (ii)
• D(kv)=(KV100(mix oil)−4.0)×25,
• D(ccsv)=100×(CCSV(mix oil)−CCSV(ref))/CCSV(ref);
• wherein the Group IV base stock reference oil is the remainder of the mixture oil absent the lubricant base stock;
• and
• further exhibiting a peak in the vicinity of the temperature T1-5° C. on the DSC curve thereof in the temperature range from −60° C. to 25° C. when the oil composition is being cooled down.