I tried the Vegatable Oil thingy. I went out, bought 5 litres of cheapo vegatable oil for £1.37, bought some NON-kerosene White spirit, and put 5 table spoons on Spirit into the vegatable oil, to break down the glyesarin,so its watery, so it can go through the injector pistons(i think). my fuel tank was on dangerous red and the little diesel symbol on my Audi A4 (1999) was flashing to say that there was no diesel left.
I slowly poured it into the tank.
The diesel gauge increased abit, so I was sure it was burning the vegatable oil.
I started the engine, and started no problem !
sounded abit ruff at the start, but after abit of accelaration in neutral, it sounded normal.
I took it for a spin to the shops, and the accelaration was pritty much normal.
When I drove it back into my garage, i smelt the fumes out of the exust, and they werent "diesel'y"
Im very please. From now on I keep a ready mixed 5 Litre tank of oil in the boot, ready for using if i runout of diesel in the middle of no were.