Best Spark Plugs Ever Used

[macojoe]

I use NGK in my Yamaha, it did nOT seem to like anything else??

My truck has AC Delco in it and believe they are factory. I will be tuning soon as with the new gas and almost 75,000 miles I think it is time.

I have always use Auto lite, I find they work great and I am old school were I tune every spring and change the plugs, so there only there at tops 20,000 mile

But I have used Champion and AC in the past with out problems!

Bottom of my list is Awfull Crummy (AC)