My trol is a 4.2 1996 oil burner I never put red stuff in , as that's illegal :/
WVO = waste veg oil and as such a no no for me. I can't be doing with all that filtering and cleaning malarky
UK Bio Diesel is a direct replacement on DI engines but not common rail as far as I know. I've been using bio for 3 years in the trol and about 30,000 miles in the truck before that ( Nissan Terrano)
Make sure your glow plugs are in good nick. You'll need to change the fuel filter a few times early on as the bio will clean out the crap from your tank and lines .I carry a spare fuel filter ( but never needed it) just incase.
You can also run on SVO = straight veg oil (new) like rapeseed for example. Often cheaper but will need thining down in the winter with diesel , so the cost advantage diminishes.