Well, I now understand how frustrating it can be to buy new spark plugs, after all the research I have done I had decided to use Motorcraft double platinums, however it seems nobody in my town has them, in fact even the platinums are hard to find, so I went to Autozone, the guy told me what they had, no platinums in Motorcraft, so I told him I would
settle for the Autolite platinums, he proceeded to tell me his theory on what should work in my truck and what oem puts in there, I said just give me the platinums, he returns a few minutes later with some autolites, the box says #1543 and it says copper, told him I wanted the platinums, he replies those are platinum, well the box says copper and there should be an AP at the beginning of the number, those are platinum he says, he had already rang them up and swiped my atm card, so i said let me see the manager, even he said, those are not platinums, he was going to get me the platinums, i said no just refund it, which he did, the clerk wanted to sell me what he thought was best for my truck. So I drove a few more miles to another store, the guy got me my Autolite platinums, no problems here, #AP 1543, even the box is blue, instead of orange. So anyways, I got them installed yesterday, which ended up taking all day. but my truck is running great with the Autolites, idles smoother and accelerates smoother, I am happy with them.
06 Sport Dark Shadow Grey 4.0l
K&N drop in, Scanguage II, Explorer Domelight and ohc
Magnaflow 2.5" catback, metal tailgate handle from graniteguy
Ultra Mongoose 178 rims 16x8 with Toyo Open Country AT II.
Cranked torsion bars
Kenwood head unit, 6.5" Kenwood Excelon components, Rockford Fosgate 10" sub, all powered by 2 Alpine amps.
coming soon: Bilstein shocks , Wet Okole seat covers.