I wasn’t using Bruce’s experience as my own. I was sighting another person who agrees that ethanol is the wrong choice. I have had issues with corrosion and certainly with older cars. Try pulling a rail on a 3.2 that has run ethanol in it. Run a scope down the holes and tell me there is not an issue running that gas. Open up a CIS head, same thing. We are not talking about a 4 year run we are talking about prolonged use. I deal with this crap on the older cars all day. So while your opinion as usual differs from the norm my experience shows other wise.. Please enlighten us and explain the difference in the older gas and the newer gas other than the marketing hype. If changes have been made they most likely will not be known for some time. Given it is not something that happens over night we most likely will not know if anything is changed. I highly doubt it. Gas is not consistent, the marketing is. Not even the octane ratings are what they are supposed to be. They are all over the map. So I am not buying the new “ethanol” blend is different. These companies are in the business to sell gas.

FWIW I also did some testing a few years back with water injection. When running an ethanol/water blend the combustion temps were higher verses just straight water.

 

I have had less problems with 100% alcohol use in my racing for the past 35 years than you are claiming is caused by a 10% blend with gasoline. The only problem with ethenol over pure gasoline is it may accumulate more water at the bottom of the fuel tank if it sits for long periods of time. This does not cause any problems with the engine if the fuel is used and replenished on a regular basis.

I have no doubts that you have come across problems with some engines running ethenol. However, I suspect that many of those engines sat for long periods of time or were not driven regularly or ran with low level of fuel in the gas tank. Otherwise, there is little chance that any moisture would be present in the fuel system. Pure gasoline will also hold water and cause corrosion in an engine that is not dirven regularly. Every gas tank has water in the bottom of it. This is why it is recommended NOT to run your car with a low level of fuel.

 

AH! Now see we finally agree on something. The problem is that Porsches in general are not daily drivers and no amount of detergents will help the issue water creates. I have no doubt that detergents have gotten much better over the years to combat the associated deposits, but in all the issue of low mileage cars that sit for days will continue to plague the likes of us that keep them running. The older CIS cars are very finicky to this and often are the biggest pain in the rear.

 

Thought you might find this interesting. I was digging through the manual for something else and ran across this. I recall a guy on the forums that had some fuel issues and the PCA rep came down and sited this as the issue. Take that with a grain of salt because you know how those guys are.