Replace the orange stuff with new Prestone orange stuff.
Chevrolet parts reviews
I've had multiple Chevy engines that gave random misfire codes with autolite plugs- then ran fine on ngk.
I replaced them with AC Delco 14 Platinums, and it seems to be running better.
I'd go with Luk. I personally have one behind a beefed up chevy 327 and have taught my kids stick with it and it's still going strong. And the shop I work for uses all Luk kits and I haven't seen one come back yet. For price, quality, and completeness of the kit they're awesome.
I’m not going to argue with anyone about what it does but I’ve used Lucas for a long long time I have a 93 Chevy truck with 400k miles that I have never taken care of correctly I have run it out of oil overheated it overloaded it and abused and mistreated the engine in that truck and its still able to do any thing I need it to.
We have the nittos on our 21 Silverado and I love them. They have 50k on them and still look new and I was really surprised by there performance in wet weather.
In my personal experience (99 suburban 6.2l 383) AC Delco spark plugs are the way to go
I had 2 sets of Goodyears and the edges wear off quick. Continentals been the best.
I found them to be pretty garbage for traction even on dry pavement, but they were quiet and smooth and lasted very well.
1600 miles on my car. Daughter drove down a road being repaired and apparently some of the rough road gouged the inner sidewall of the left rear. The construction is just a mile away. She arrived home and I received a low tire alert. An hour later tire was completely flat at 6 psi. The tire was peeled back in three places. Self sealing did nothing.
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