Not a lot, yet. Fueled my overly thirsty car.
I have been pleasantly surprised how well my old (eleven years old, now) car has handled its drink, lately.
I gave it (well, that's not right. I paid through the nose to a competent mechanic, who fixed all that he found wrong) a thorough tuning last month, tires, wires, plugs, computer tweaks, filters, etc. (shit, it was in October, not last month) and I have been impressed by how the performance of my old drive has been stepped up and the guzzling of fuel has been lessened.
Fortunately I do not drive it much, but to have it anxious to go when I want is a good feeling, again.
The issue with the sub-computer, which was draining the battery, randomly, intermittently, was a pain in the arse!!