I live in Michigan and we will be storing our Mini in an Insulated non heated very nice garage. What would you do besides the normal fill tank and use stabilizer and check fluids? Should I unhook the battery? Use a trickle charger? Spray lubricant in the cylinders if possible? etc.
I had a MGB and those were the things we did to keep it running nice in the Spring.

Thanks

Art

 

http://blog.bavauto.com/788/long-ter...ge-guidelines/

The linked article addresses how to prepare a MINI for storage.

 

Car cover and check all the fluid , trickle charger is a must treat the top with cleaner and protectant while you are at it. If you can start and run the car one a month for a short time.

As a fellow Convertible owner , let me know if you have any questions.