E3.54 E3 Premium Automotive Spark Plugs (8-PACK)

2002 Tahoe Z-71 5.3 flex. These plugs work fantastic. Yes! You will here from Iridium plug people that you can't use anything else but Iridium. Sorry!! I've been running these for 3 years now. Not 1 problem.

Great preference, great price. 😁

Great

They do look different and do not require gaping. Find the right size for you and the same stock temp and go. Installed like normal plugs. expensive. simple pain to do plugs on my rig. Will buy more again. I installed these with some granatelli wires so I can't tell if these made a difference or the plugs, or the combination of the two. I can tell you that there is a difference that makes my truck want to go into overdrive more often than it used too. So it's making more power lower in the band than it did before. How much? Can't say. I installed an oil catch can and it seemed to help hold speed on some hills. After installing these, I actually gain a small amount of speed in some of those same places I tested before. I believe that, low OHM wires do make a difference, even though I am still rocking my stock coil packs. It did run a little weird for a little bit. I think the computer readjusting as it also ran a little weird after an oil catch can install. 2009 silverado LS 4.8 stock

Installed a week ago and have noticed enhanced performance and better fuel mileage with my vehicle

I have been running E3 spark plugs in all my vehicles and equipment for years. I even run them in my outboard motor! I have found that they do help my mileage and add a little bit of pep to my acceleration as well. I have never had one foul or fail in any way. No fuss with messing trying to set the gap as they come pre-gapped and are not adjustable. No more expensive that most other name brand quality spark plugs.

I made the mistake of believing the hype for E3 plugs on TV and bought these for my 2008 Chevy Avalanche with 5.3l flex fuel engine. They replaced Delco 41-110 Iridium plugs. Mileage decreased by about 1 1/2 MPG and there was a persistent random misfire at idle. After 4000 miles I replaced them with new Delco 41-110 plugs. Idle is extremely smooth with no misfire and MPG has increased. Based on this experience I will never again buy E3 plugs. They cost me lots of extra fuel money and the hassle of having to again buy and change plugs. Update: Random misfire and back-fire under hard acceleration after installing the E3 plugs indicated that the E3 plugs were not the problem. I replaced the coils and removed and thoroughly cleaned the injectors and made sure the plug wire were securely attached. The engine now runs as it should. I will probably reinstall the E3 plugs at some time.

These are the only spark plugs I use.

well everything i’ve read and heard says these are supposed to improve ignition and fuel economy. here’s hoping the mighty they’re right.

Don’t waste your money