What do y'all think of Iridium spark plugs? My brother asked me about them
for his airplane.
He says he is happy with the mileage -- about 30 mpg at a slow cruise speed of
140 mph. The motor starts before the second prop blade passes, so starting is
very good as well.
He has a flat six motor with a second, redundant ignition system. So, 12
plugs at $7.40 ea. and he changes them every 100 hours. It gets costly. Are
iridium plugs worth the extra cash?
Thx.
LAD
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