[Dave80GTSi]

This old thread came up in a Search, so rather than create a new discussion, I figured I'd just tag on.

Filling up my 986 S fuel tank this a.m., I find that my local Sheetz now offers me a choice of fuels:

a). 93 octane with 10% ethanol, and
b). 90 octane with No ethanol.

My 986's owner's manual clearly calls out 93 octane minimum with the comment also that ethanol fuel use is fine. So that part's quite clear, and I've been using it exclusively to date.

But in my case, this car does not receive regular use - over the past couple of years, I've only driven maybe 500 miles each summer, only about 2 tank's worth / year. And the car sits idle for maybe 6 months at a time during our winters. So there's a lot of time where the fuel just sits there in the car's tank, waiting patiently for something to do.

I dutifully throw a bottle of Sta-Bil into the tank each and every fall, prior to winter storage, and so far I've not observed any fuel-related issues upon the spring start-up.

But after lots of anecdotal warnings about the effects of long-term ethanol deterioration (including some right here in this old thread above), I am now beginning to believe that the use of 90 octane non-ethanol fuel is in my long term best interest, those missing 3 octane points notwithstanding.

Any fresh thoughts since the last post (2018) in this discussion, either pro or con?

Cheers - DM