Split Fire Spark Plugs are great.......as a marketing gimmick. There MAY be
a slight advantage in cars that tend to continually foul plugs, but I''ve
found this is better remedied by changing spark plug heat ranges or replacing
the piston rings/valve guides/whatever is letting oil into the cylinder.
If they were so good... wouldn't you see race cars using them? Seriously,
use a good quality, name brand plug.
A further hint: sand blasting plugs to clean them LESSENS their
effectiveness (yes, it does remove deposits, restoring the elctrode surface).
The most efficient plug is one that has the sharpest edge on the end of the
center and side electrode.. blasting (and long term wear) rounds off the
edges. Thats' why race teams routinely throw plugs away after almost every
use.....
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