suzuki-guy

what is the best spark plug for chevys? i use bosch but just wondering what you guys use

MDTAHOE

Bosch is the absolute worst plug ever unless you are putting it in a european car. For some reason Autozone pushes those pieces of shi..... You should use the AC delco stock plug

in2pro

I can't speak to the Bosch plugs,
but I 100% agree with MDTAHOE, stick with the AC Delco, unless you are going to replace your entire ignition system with matched components like MSD Ignition, buying anything other then stock isn't going to get you any performance gains, regular maintenance, checking gap every 20K or so and keeping your system matched coil to plug is your best bet.

therewolf

I replaced the AC Delco highly touted "100,000" mile Iridium plugs at 57K, good thing too, they were getting ready to self-destruct.

I used AC Delco for replacements; but I will be following this thread with interest.

Hap Trails

I always use AC Delco's The heat range is where the factory wants it to be. Other brands are different.

Mike Sigmond

I use the Bosch platnium 2's and never had a problem. But I have learned my lesson that pretty plugs dont always mean pretty performance.I have done alot of reading on plugs lately and I will be switching back to the AC Delco Iridium's next round.

suzuki-guy

sounds like im gonna go pick up some ac delcos tonight!!

98white5.0

Mine are some NGK iridium thingy whatever they are called kind. They have a small electrode on them for a more concentrated spark. They can't be gapped because it might break that small point off (that's what the box even says). I've used them for about 8k so far. No problems. My dad still has the originals in his truck. It has 136k. My stepmom's camry has the original bosch +2 kind in it. It has 200k. She also changes the oil (conventional type) every 10k. She's the original owner of the car and only had a timing belt come apart at 120k. It happened at a bad location, in the middle of rush hour traffic. Luckily my blazer was ready to tow it home. Ha. Chevy wins!!

suzuki-guy

yeah i heard to use eveything acdelco on chevys as

therewolf

I wouldn't say "everything" . I'm using a lot of aftermarket stuff on my truck, it's cheaper than O.E.M. AND better.

I'm personally waiting for HALO to start making plugs for my truck, and a decent MSD ignition sure wouldn't hurt my feelings.

For what you pay for an AC DELCO Battery, you could buy an Interstate. Not much choice there.