Thread: 1st Time Pontiac Owner, How to Improve MPG???

Anything else kinda just doesnt work. They only like Iridium plugs or copper core plugs.

The waste spark ignition system eats platinum plugs alive and anything like a E3 plug is pure junk.

Copper plugs only last 15k miles roughly but the stock iridium ac delco plugs are 75-100k miles and are the best overall.

Originally Posted by Fivefingerdeathpunch

Anything else kinda just doesnt work. They only like Iridium plugs or copper core plugs.

The waste spark ignition system eats platinum plugs alive and anything like a E3 plug is pure junk.

Copper plugs only last 15k miles roughly but the stock iridium ac delco plugs are 75-100k miles and are the best overall.

Okay perfect that's really good info thanks, not sure what they put in when they did them last time but carfax says the new plugs were not put in at a dealership so I wouldn't be surprised if they were non oem.

Seems these motors really like oem stuff.