[Howard]

If you don't want to run E10, then don't.
Use premium. Costs a bit more but doesn't go off as quick! Is not as hygroscopic. Contains less deposits.

(Remember when you had a choice of "Super" or "Standard"? Nobody used "Standard", only "Super" will do!! Why has this changed? Why do we insist on using the cheapest shite?)

Tony, as for your bio-diesel, you have to be VERY careful with modern diesel systems, especially common-rail technology. The local Nissan & Toyota dealers are doing a lot of diesel fuel system repairs, as are tractor workshops. Not a cheap repair.