I used E10 for every fill up 1 year ago, because I was accually seeing a good cost saving (I do a heap of Ks).
Someone has got greedy somewere along the line, the cost difference to ULP closed several cents over night for no obvious reason and stayed there.
The cost for me is now about the same each week to run ULP or E10.
But I dropped E10 as soon as the price jumped (my own personal protest).
I'm guessing I wasn't the only one.
My other person protest is to never use one of these "save 4 cents" dockets.
Maybe if everyone joined me they would go the same way as E10 and we could just by our groceries and petrol at a non-inflated price.
I Know...I'm dreaming. But I do feel a little better now that I've vented.
