Leaving my vehicle (2008 Pathfinder with the V8) parked for 3+ weeks, this is how I prepared:
- It was due for an oil change anyway, so it got an oil change as I hate the idea of dirty oil sitting still in the oil passaged for weeks at a time
- I put one of the anti UV/heat shields into the windshield
- Put a can of Seafoam into the fuel tank as a mild stabilizer
- Topped the car off with 93 Octane Non Ethanol fuel
- Then drove home in a roundabout way to make sure this fuel and the Seafoam wasnt just sitting in the tank but got into the fuel lines as well.
One thing I did not do was disconnect the battery.
Why? I think of it as a test of both vehicle and battery, if it does not start I know I need to replace battery and/or I likely have a draw somewhere.
I am willing to take that chance as my other vehicle (a 2011 Xterra) has the same size battery (24F) but its oversized for that application (calls for 35) and its an AGM cell to boot.
So I am confident the XTerra will start and I have jumper cables to start the Pthy if need be.
So far it has never given me any indication about being a weak starter so I expect it will start, but I do want to test it.