E3 Spark Plugs
I don't mean to get off again on plugs, but I will anyway... 
Okay...so if I decide to use E3 plugs...which ones do I use?
My OE plug is a Champion RC12LC4. If you look at the crossreference for the E3 plug (http://www.e3sparkplugs.com/pdf/e3autocross.pdf), I should use an E3.56. Okay, fair enough.
But the Autolite 5224 is supposed to be the same as the Champion RC12LC4. We all know that. But if you look up the Autolite 5224 on the E3 crossreference, it says to use the E3.48.
So which is correct? The E3.56 or the E3.48?
You can see how I don't get a "warm fuzzy" here.

Okay...so if I decide to use E3 plugs...which ones do I use?
My OE plug is a Champion RC12LC4. If you look at the crossreference for the E3 plug (http://www.e3sparkplugs.com/pdf/e3autocross.pdf), I should use an E3.56. Okay, fair enough.
But the Autolite 5224 is supposed to be the same as the Champion RC12LC4. We all know that. But if you look up the Autolite 5224 on the E3 crossreference, it says to use the E3.48.
So which is correct? The E3.56 or the E3.48?
You can see how I don't get a "warm fuzzy" here.


