When I think about the last time I used Champion
plugs, it was in my 66 Chevy. That said, I should
not bash Champion plugs today, since they may have
improved over the years.
In my 66, the Champions would wear very fast, so
I switched to AC's, which when visually inspected
look like much higher quality than the Champions.
They also lasted longer had less electrode wear,
and thus held a gap better.
I also have a Mitsubishi, and I have always used
NGK's, which also are of very high quality. In
fact when I remove/replace them every 15K miles, they
still look very good. I also run the NGK's in my
mower, with good results.
It used to be before the internet days, it was a
hassle to get Lodge plugs for our Alfas. I always
bought them 8 at a time just to keep some around.
Now you can go on line and find about a dozen places that
stock them for around $5 each. As a comparision,
my NGK's run about $2-3 each, so not a significant
difference in price.
I also have a Honda Odyssey, and I think it has
Nippodenso plugs, and they want $12 each!! They
also say that they last 100K miles, we'll see.
Man, Im rambling here, coffee has not kicked in yet