: Ignition parts/recommendation

05-10-09, 05:40 PM
I'm getting a tune-up done fairly soon & would be happy for suggestions re brand of ignition components. Would AC-Delco be a better bet than NGK, Denso, Autolite, etc? Are platinum plugs really worth the extra $$, or more hype than substance? Thanx for any advice or recommendations! :hmm:

05-10-09, 05:50 PM
Stick with AC Delco. Delco brand patinum would be worth it only if you keep the car along time. Platinum plugs go at least 90,000 miles between replacements. I did this on my 88 Allante because of the hard to get to rear plugs. Simply asked for the 91 4.5 Delco platinum type and put them in my 88 4.1

05-12-09, 05:39 PM
I stick with AC Delco too and if the car came from the factory with platinum I replace with platinum. They aren't hype, they really do last a lot longer and that is the only way you can get these 90-120k mile service intervals out of spark plugs that manufacturers do now. If you don't replace with platinums you should replace more frequently, like 30k.

Highway Star
05-12-09, 07:15 PM
I'm using AC Delco "Rapidfire" plugs in my '79. Great plugs.

05-14-09, 05:26 AM
I noticed that RockAuto.com has the "Rapidfire" plugs available for my year/make of Caddy ... though they have a gap of 0.045 . Wouldn't that be a drawback if the usual gap is 0.060? Obviously there's some technical reason for the 0.045 gap, but I've no idea myself.

05-14-09, 04:20 PM
Less chance of gas fouling at .045