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Originally Posted by blue2000s
If it were sensative to this, it would be a widespread problem with all Porsches. It would also not be helped by switching to a lower octane fuel. I don't believe this is his problem.
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Hi,
Never said it
was his problem, just that the guy's theory was credible. It may not appear in other models because they use a different software version and/or different Maps for their specific application.
If this were actually the problem, switching to a lower Octane fuel would have a positive effect. This is because the MBTE, EBTE and other compounds are primarily added as Octane Boosters. As these are replaced in the Winter by cheaper Butane and Oxygen, the concentrations of these compounds is less at lower octanes where the need to add boosters is not so high. Lesser concentrations = less stuff in the exhaust which the Sensor/DME doesn't like and could remain below the problem threshold. It won't hurt to run a tank or so of lower octane fuel, won't grenade the engine, only over the long term would you be risking anything...
Happy Motoring!... Jim'99