[JFP in PA]

First of all, if you are doing that few miles, you really need to drive it more! In any case, low milage cars should be adding a fuel stabilizer before topping the tank up. My personal favorite is Stabil, but there are other quality products as well.

And as for those using hyper expensive high-octane fuels to get their cats hotter, they really need to read up on the subject of octane ratings vs. burn temperatures; higher octane does not burn hotter, they are simply spending money based upon and old wives tale.........