I've stored a car over winter for 3 years (in a dehumidified garage), and I inflate the tyres to 50psi and leave it on a trickle charger. I used to start it every month, but I think that just puts more wear on it when you aren't using it.

On the Mini - there's a boot release pull under the rear seats. 4k, I'd change the oil every year but I'm a bit anal about oil changes - for all the cost, it's well worth it in the long run IMO.

Make sure you drive the car after washing it before putting it away - if you put it away with wet discs you'll ruin them (ask me how I know).

I wouldn't leave silica gel inside - you can dry out the leather/seals. Moisture is most dangerous on bodywork. Ideally you want 45-55% humidity, but if it's outside you don't have that luxury.

I leave mine full of fuel with stabiliser - if you leave the tank half full, you can get condensation inside with equals corrosion. Gives you a good excuse to rag it in the spring to burn off the old fuel!

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