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Should You Use Ethanol-Free Gas for Your Air-Cooled Porsche?

A big discussion point whenever Air-Cooled Porsche owners get together is whether the cars should use ethanol-free gas. The reason is that common wisdom is that Ethanol in gasoline is corrosive and degrades plastic and rubber components of your fuel system and can burn at higher temperatures causing premature cylinder wear and scoring.


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Recommended Gasoline for Air-Cooled Porsches

The big question now is, should you only use Ethanol-free gas in your Air-Cooled Porsche? The first place to look is to Porsche. According to the Porsche web site, it is suggested that any Porsche prior to 1996 should use Ethanol-free gasoline. From 1996 on-wards, Porsche engines were designed to accommodate ethanol gasoline.


Just the fact that Porsche recommends the use of ethanol-free gasoline for air-cooled Porsches prior to 1996 should be enough to make you fill your Porsche with ethanol-free. The other consideration is that you normally don’t drive your Air-Cooled Porsche on a regular basis so the gas is sitting in the fuel system and has a greater opportunity of causing corrosive damage to your fuel system.


Ethanol started to be added to gasoline in the late-1970’s and most top-tier gas stations now have Ethanol-blended gasoline. A top-tier gasoline is defined as one that maintains levels of detergent additives that result in higher standard of engine cleanliness and performance compared to the EPA requirements.