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what spark plug brand?

2021 15
HEy whats up?

I was wondering what brand of spark plugs you would recommend for a '91 LX?

I've been told about Autolite and Motorcraft? Any preference? Others?

Thanks.
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iv tried tons of plugs over the years and i like autolite platniums
I have tried all brands as well, motorcraft, bosche, splitfire, NGKS etc

AUTOLITES are better so far. But I do not run the platinums though.
I have tried a few different plugs as well and found the autolites to be the best. I would not recommend the platinum's though. Copper plugs are the way to go. Copper is a substantially better conductor than platinum, the only reason to use platinum is that they last longer than a copper plug.
Plain old Autolites or Motorcrafts are the best choice hands down!
YES! Autolite 25s
systronic said:
isnt it #25?
Naturally aspirated go autolite 3924s nitrous go 3922s!
what kind of plugs would you use in a blown app.
I've always used Autolites and have been happy with 'em.

I hear you want to stay away from Champion plugs for a 5.0 because they tend to wear very quickly in that engine for some reason...
Don't use the Bosch paltinums, I tried them and got backfire issues. Swapped them out for Autolites and case closed.
1stPny said:
I have tried all brands as well, motorcraft, bosche, splitfire, NGKS etc

AUTOLITES are better so far. But I do not run the platinums though.
Autolite 24 is one step colder than 25. And 23 is one step colder than 24.

89BlackStang said:
Naturally aspirated go autolite 3924s nitrous go 3922s!
WRONG reach for stock heads.
I've allways used the motorcrafts in my stang and never had issues.I would recomend them.Whatever you do stay away from the splitfires.
Trickflow recommends 3924 on their heads if its N/a and 3923 boosted.
another spark plug thread eh, well I used autolites #24, some people say 25s but mine are 24s gapped to .050, found these to work best out of all plugs I've used so far...
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