Engine Misfire and Lean Codes

[Trav]

According to our owners manual, one should not top off the tank with less than $10.00 etc they suggest wating till at least half a tank to top off.. this will throw the lean code because the fuel system hasn't calibrated the amount of fuel thats in the tank, this is exactly what happen to our van. But I was running the eFuels and topped it off with approx $10.00 worth of fuel.. a few mins later we get a lean code. Had the shop clear the code then checked the owners manual.

Next time I gas up I am only putting $9 worth of gas or should that be $11 because I have 1/2 a tank? LOL