[Matticus_Rex]

Yeah, you've nailed it. If a spark plug manufacturer claimed that spark plugs added [insert amount] of value to the economy and claimed the entire amount of value cars add to the economy, everyone could and should call BS on that, despite the fact that without a spark plug, the car doesn't run. It's simply bad accounting.

[toast0]

Splitting hairs, but diesel cars are common in Europe and don't have spark plugs.

[hawkice]

Brace yourself: you aren't splitting hairs, you're nitpicking.

[imtringued]

This only adds to the argument because it shows that the importance of spark plugs is overblown.