Quote:
Originally Posted by shadrach74
The injector improvements you mention likely lead to better distribution through improved atomization of the fuel in the combustion chamber. Regarding spark plug life, the effects of these improvements are probably so small as to likely be irrelevant. The correct heat range and electrode material have a much larger effect on plug life.
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Sparkplugs did not change, sparkplug life changed, so Porsche extended the recommended change interval. Keep in mind sparkplugs are cheap, gasoline is not, & neither is Porsche labor, but once the sparkplug is removed for inspection there is no abitional charge to reinstall new plugs. Also late model Porsches do not have magnetos