Spark plug OEM FORD or Autolite

i run autolite 63 (gap to 24 thousandths) on my stage 4 for 500 miles with nitrous, they look perfect. 99 cents each. to each his own.

It has been satisfactorily argued that the inexpensive Autolites work as well as the expensive Iridiums, with the understanding that the Autolites must be changed more often.

i just changed mine out.. i put in the autolite 3923's ($4 for the set) . they seem to work fine. one thing to watch out for though - they were all gapped differently out of the package. be sure to measure the gap before putting them in, just in case. (the gap should be .028)

I have autolites, they work well, but the car became jerky at part throttle when gapped at .024, runs better when opened wider for some reason.

I didn't know any better and used ****ty autolite spark plugs, and everything was fine and the misfires went away... A few days ago I noticed on quick acceleration and around 4-5k RPM's, the engine loses power, accelerates slower than...well, slower than a 2.0 normally is.

The autolite is a cheap plug, not what is recommended to be used.

Don't put autolite (autocrap) in your car, they're junk.

I've gotten autolites a few times for some domestic cars and they've been 0.005\" - 0.010\" off seemingly across the board, compared to what the box said they should be. And I wasted a day hunting down a misfire that turned out to be a bad spark plug out of the box.

Don't go with Autolite XP iridium. I had on my Jetta and one of the tips basically melted after 25k. They suck.

econolines are ok except for one huge cluster****. On the late 90s through 02 i think they built them with too few threads on the heads for the spark plugs. Consequently spark plugs routinely blow out.