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Most of today's vehicles are of such low compression ratio that there is truly no need for premium fuel. Premium only helps when the engine is "high compression". The simple fact is, your engine will work better and give you fewer injector related problems if you buy "fresh" fuel that has not been sitting at the filling station for a long time. Older fuel tends to be more likely to result in deposits on the injectors.

Answer 2Yes, you really do need to use premium (defined in the owner's manual as 91 octane or above) fuel in your GTP. This is because the higher output of the engine using the compressed air from the supercharger will be more prone to detonation (premature ignition of the air/fuel mixture) than a similar normally aspirated engine. Higher octane fuels prevent detonation and knock. In extreme cases you may use regular octanes, but do not do so for long.

The GTP uses a "high compression" engine because it uses a supercharger.

Hope this helps.

G

2011-09-13 00:35:16
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