Which spark plug is best
Le Mans Master
Joined: May 1999
Posts: 6,514
Likes: 1,301
From: Windermere FL
On no, not another "which oil to use", "Which spark plug wire to use", "Which grade gasoline to use" thread!
But to answer your questions, just stick with AC Delco Rapid Fire plugs with the OEM heat range for your car.
But to answer your questions, just stick with AC Delco Rapid Fire plugs with the OEM heat range for your car.
Safety Car
Joined: Nov 2008
Posts: 4,328
Likes: 15
From: Jacksonville FL
Team Owner
Joined: Sep 2003
Posts: 20,176
Likes: 673
From: Freedom is never more than one generation away from extinction.
St. Jude '03 thru '24
Gotta get the whole gang in here...Most importantly, Each mfgr has a little bit different heat range variation.
Which is why I stick to US mfgrs.
AC will give the best overall.
All the special "this and that" plugs just aren't going to make more HP.
You'll get more from a NOS sticker...
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