This seemed like a pretty good list and associated advice:
- Replace the engine oil with fresh, new oil
- Change out the oil filter for a new one
- Remove and replace the transmission fluid
- Install a new battery
- Flush the radiator and replace coolants
- Replace the brake fluid
- Add new power steering fluid
- Pump out the old gas and replace it with fresh gas
https://mandjsunshine.com/mj-sunshin...sitting-years/