Dan's Theory of Cars and Matrimony

So, if this is true, my wife and I should stay married for quite a long time past our now two years. We have a 2004 Pontiac Vibe that we bought in March 2008 with 53K; it now has 223K. We are getting ready to get rid of the 2004 Ford Ranger with only 110K (only 10k of which we put on it). So, it should follow by keeping the vehicle with the most mileage, we should last. I can’t speak to the trading of the spouse as this is the first marriage for both of us. I hope the theory is true.