Here in Toronto, most stations have only one ULSD and I can only find V-Power (Premium) Diesel in Shell stations!
Initially I've used V-Power Diesel but have not found it any different from regular ULSD so I've not bothered with V-Power for the past almost three years of driving my diesel vehicles and so far so good.
The FE on the D seems to be improving with 100,000 KM on the clock.
Frankly I cannot justify getting rid of the D even if BMW brings in a 320d with higher MPG since my D is paid in full from day one.
I would stand to lose over $30K in depreciation just to gain a few MPG and incur new dept or shell out more $$$ just doesn't make sense.
For now, unless my D starts acting up I'll drive it till it drops dead!
2013 E350 BlueTec
2011 VW Jetta TDI