Winter storage of convertible.?

I would disconnect the battery and charge it later if need be and i would put the car on jack stands just to take the weight off of the tires.

You dont want to worry about a charger being hooked to your car while you're sleeping or out skiing,and remember,cold temps deflate tires!

for that short period of time not much you need to do I wouldn't even disconnect the battery what I do with my cars and I live in Michigan is I have a trickle charger and I put that on it a couple of times like every 6 to 8 weeks and you can leave that hooked to your battery for a day or a week that will keep it alive and healthy other wise there isn't any thing to be concerned about. if it was for a year or more then there are lots of things that would be beneficial but 3 months don't worry about it.

Gas stabilizer, I use Store-N-start from any boat store, you pour it in, run the engine it coats all the fuel system parts with a coating, turn the engine off. Wax the vehicle after washing, Armour-all the tires so they don't dry out the rubber from standing too long, use silicone on all the engine hoses, brake hoses, gas line hoses, this is thorough, but its the way I properly store a car. Use preservative on the convertible rooftop.

Some fuel stabilizer can help but is not necessary. Take the battery out and store it in a warm place with a trickle charger to keep it from going completely dead. Make sure that the anti-freeze in the engine can handle the coldest temperatures you have.

just some gas stabilizer, and be ready to give it a jump start when winters over