None; I don't reward companies for putting out poor-quality junk by buying it. There's no good reason to cut fingers (and booger up head threads) with those sharp-edged, shoddily-cut threads of theirs, nor put up with a spark plug that's almost kinda near sorta the right heat range on account of their massive overconsolidation, when you can buy much better-made NGKs of the right heat range for reasonable money.