NGK or AC Delco here as well. Never had an issue.

 

I use 8 zippo lighters. There GREAT.

 

I have always had issues with Autolites. I have had them not work right out of the box, had them fail after there warmed up on a test drive, had them come back any were from a week to a month later when they fail. Even when they don't fail, they deteriorate faster then any other plug. I have never had a happy customer when these plugs were used. There less expensive for a reason.

I can't say I prefer any one specific brand But I always use what came in it from the manufacture and it has never caused me any issues. In some cases customers noticed the difference with new plugs and would call back to thank me or thank me on there next visit. Something that never happened trying to use Autolites.

 

< Those are better.

 

Are E3 plugs really that bad?

 

i Used autolites NGK's and delcos. IMO delco is the way to go for N/A motors expensive but worth it. I run NGK's BR7EF at the moment only cause im set up for my 150 shot. but If i go back to N/A im putting another set of delcos in it. I ran a set of autolites for about a week and started having a rough idle and checked the plugs and two were fouled? Checked my tune and codes and nothing was off or wrong. changed to my NGK's and havent had a problem since.

 

I sure haven't ever had very good luck with anything but Delco or NGK's. I've tried em all pretty much, Bosch, Autolite etc....... and mileage always seemed to drop and overall the vehicle just did not run or idle like it should.


Champions are good in small engines from my personal experience.

 

that's been my observation as well.