If it doesn't see too many miles then any good quality synethic should be good with oem filter once a year.
The biggest thing that kills cars is sitting, so like other say sell it if you can. just make sure there is no moisture or salt on the frame while it sits or else it will rust out pretty quickly. Fluid film/ oil it before you sit. Also tires do get messed up if they sit for extended periods of time. put the car on jacks if does sit for an extended period of time.
