Chumps! I like that!
I just threw a set of NGK Iridiums in my Silverado to replace the AC Delcos it came with. Supposed to be able to run those Delcos to 100k miles, but this is 21st century GM we're talking about - don't feel like replacing or tapping/re-threading cylinder heads at 100k miles ...
Yep - when grandpa told us something was junk, there was a reason behind that.
I'll have to take pics of grandpa's giant plastic Chumpion
spark plug & sign tomorrow.
He'd been working on engines since he was old enough to pick up and hold a wrench in his hand. I'd imagine the first engines he touched were hit & miss farm workhorses, and then cars in his early to late teens (and coincidentally, in the teens of the 20th century). His father was a steam engineer, so he was charting new territory with the internal combustion engine. He grew up in the best possible times. Hit some rough patches through the depression, but his ingenuity got him through that completely unscathed. He and my grandma sold skunk pelts, and he repaired the first oil burners for barter. I'm sure lots of cars came his way then as well. Probably why when I was a kid he could rebuild any part of a Model T with his eyes closed.
He hated jap cars. Told my aunt, who drove her misfiring jap special up there, that he doesn't work on cars with bamboo connecting rods.