Low viscosity oligomer oil product, process and composition

A synthetic fluid composition comprising a hydrogenated reaction product of a vinylidene olefin having a vinylidene content of greater than 70% with a second alpha olefin, excluding 1-decene, in the presence of BF3 catalyst and a promoter system that includes a mixture of at least one aprotic compound with at least one protic compound;

• wherein the synthetic fluid composition includes 5 weight percent or less of C42 to C48 components,
• wherein the synthetic fluid has a 3.5 to 4.1 cSt viscosity at 100° C., with Noack volatility weight loss of less than 16%, a Viscosity Index of greater than 120, a Pour Point lower than −50° C., and a viscosity at −40° C. of less than 3000 cSt.