OK, it seems that their click and collect thing doesn't like anyone ordering over a certain amount of anything, let alone oil. And of course not a lot was in stock so they price matched a load of other oil and I got 105 liters for £84.
Just done my first 3 miles with some in it.
Don't use Sunflower Oil!
That's what they've substituted for me before.
It's not good for your pump.
seen as this good deal of 80p a litre of tesco's finest is ending on the 29th I just picked up 8 bottles to keep me going on a diesel/oil mix for a while longer. I have done no mods to mine to run it and it runs fine. I even had 2 cyclist ride past me in the cambridge traffic today and ask for some chips lol