Autolite HT15 Platinum High Thread Spark Plug, Pack of 1

I have to use these due to our Ford Expedition 5.4 blew a spark plug about 13 years ago. With the insert they work great and last about 7 years before needing replacement. Much cheaper than the local parts stores.

Worked as listed ,fit perfect , cheaper than parts store

I rate these Autolite High Thread Spark Plugs a 5 Star due to the are the top of line Spark plug. I had Motorcraft H515 stock plugs in my 2007 Ford F150 and after 55K miles they all started to fail. Gas mileage went down and excelleration was sluggish, on top of that I was getting a chuckleing in the engine when the RPMs were at 1Grand and I was slowly giving gas to keep my speed up, the engine would chuckle and spit. At first I thought it would be the Transmission and I went and had the Transmission flushed and put in a new tranny filter. That did not work. I was still getting the sluggish pick up. Since I did not get any codes from the chuckleing in my excelleration I asked a freind and he told me it could be a coil pack bad or a spark plug bad. So, when I went to change out the Spark Plugs, if any of you have a Ford F150 knows that changing the spark plugs and coil packs in this 5.4 Ltr Triton V8 is NO FEAKIN JOKE!, every single spark plug was pretty much burned out and of course I broke the first one off inside the cylinder. Even though I tried to avoid that expensive Tune-up to do it myself, I still ended up paying a rather large repare bill to get the remaining plugs out. In the end, I had these Autolites put in and now my truck runs like it is a brand new truck. Excelleration is instant and the gas mileage just went up 3 more miles to the gallon.

These work great in my 2008 F250,5.4,everybody that has the triton knows the pain of changing these plugs,do yourself a favor and put a light coat of antisieze on the the threads and the "shaft"round portion on these plugs for later removal

Good cosruction and thick welded electrode.

Parts were correct and work perfectly

these fixed my problem with misses and my expedition is running like new, only word of caution is to take your time and do these plugs by the book or you will break them and when putting them back in possibly mess your heads up, be careful and its a breeze

well so far these are proving to be good plugs and with a $3.00 rebate per plug, no misfires plenty powerful stuff. Autolite has a spark plug rep. on you tube with a professional video to explain how to properly remove old original plugs, use anti-seize. I felt comfortable following autolites procedures and product but I used deep creep(very good product) but if you can get kroil on amazon do that! and don't be afraid to wait a few hours or over night after you break plugs 1/8-1/4 turn. spray and pray before that also. I broke one plug out of 8, but that's pretty good and used the lisle broke plug removal kit that I rented and returned to O'reilly. they just hold your money till you return tool kit. It's a 2 day job and that's ok if your patient you'll be rewarded.