Bought a 77 Suburban, 4 wheel drive, loaded. Brand New. Kept it 21 years and sold it for 1K dollors. Bought a 98 Silverado 4 wheel drive, brand new and kept it 21 years. Sold it for 3500 dollors. My 2007 Duramax is at 116K miles, and mostly sets in the barn. Ill have it til I die or give it to my grandson. My 2015 High Country, will be the same....Or until I am too old to work on it and have to buy an Electric Car....?.....Forever car.....It can be done.....It helps if you grew up in a time way, way back, when working on a car was a passion....and not a hobby. You had to be able to paint, build motors, transmissons, rear ends, and repair anything that was thrown at you. And most of all.......You have to have your HEALTH... Its much easier to have a forever car if you smoke, drink, do drugs and be stupid with your life. You wont be around ....Forever....and if you are, you will be too sick to worry about trying to keep a Forever Car.
Keep it garaged and painted underneath. Dont run to the car wash every time it gets salt on it.....Keep it dry....Dont soak it down at the car wash every week in the winter. Once every 3 weeks to a month is enough. This tip is contrary to all logic...Take it for what its worth to you. I have all kinds of other tips but you will have to figure them out yourself. Good luck on your " Forever " ..venture. ....