A lubricant composition comprises a base oil and a viscosity modifier including an ethylene\u03b1-olefin interpolymer. The phase shifter 24 controls the phase difference between the first current ie1 and the second current ie2 so that the first current ie1 and the second current ie2 have components to cancel each other. The outlet element and the chamber are disposed such that gas flow therethrough is substantially uniform. By placing the options outside the grantor’s estate, the method takes advantage of the appreciation of the options in said GRAT.