Ok let me address the Sta-Bil question. A good friend whom I know from the MC racing world states that we should be using Sta-Bil with Ethanol treatment EVERY fill up if you live in an area that has gasoline w/ ethanol E10 in it. Where I am in the Northeast in the winter we have it. Ethanol draws in moisture and starts to attack gasoline almost immediately when it gets in your tank. Rust gummed up Carbs and injectors are just some of the problems. It is much worse with small engines. Unfortunately it is here to stay so we just have to learn how to deal with it.
My buddy BTW is an engineer and was the fuel delivery consultant on the early Drone projects for the US Government and is considered a foremost expert on the subject. So basically when he speaks I listen. Also I have been using a Battery Tender for about 25 years or more on all my bikes W/O any ill affects on the battery. I currently use one along w a cigarette lighter adapter on my C4S. As per someone here on this board suggested. My car has been in storage since Mid Dec. and seems to be doing great. I also use 3 thick pieces of rubber called Lynatex I believe under the tires to prevent flat spots.

 

Sta-bil usage might be called for in gas tanks of gasoline powered equipment that sees infrequent use and which have vented gas tanks which can breathe outside air in during temp changes.

It might be called for for use in vehicles that are put away for the winter.

But it is not necessary for use in vehicles that are used year round.

In the case of our Porsches the fuel tanks are plastic and the fuel tanks are sealed and thus do not breathe in outside air (or vent fumes to the outside) thus there is not the risk of condensation that older vented fuel tanks had.

Additionally many underground storage tanks are now double walled and made of a very durable/thick walled plastic which cuts down on the build up of water in the tanks. These tanks are also sealed and do not breathe outside air.

I've run thousands of gallons of gasoline with nominally 10% ethanol (the actual percentage is between 7% and 8% based on my research) through my Porsches and have not once had any problems with the fuel.

The fuel pump in my Boxster lasted around 200K miles and when the pump was removed its housing showed no signs of any contact with water and the tech reported the tank floor had no water sign and little particulate matter.

Instead of Sta-bil do this: Buy a top tier gasoline from a busy station and try to avoid filling up as a tanker truck is making a delivery. I've checked into this and while I'm assured the filters at the pump dispensers are quite good avoiding filling up as the tanker truck is making a delivery provides some exra margin of safety against getting gasoline with stirred up particulate matter or water into your vehicle's gas tank.