My mother is giving us her car. It's a 93 Camry with only 56K on it. It hasn't been driven or started in about 15 months. It's being stored in a dry climate in her garage. The oil was changed just before she stopped driving it. But no gas stabilizer was ever put in it. We're going to have to drive the car 700 miles across the desert to get home. Is there anything we need to do about the old gas in the tank? Would "Heat" help? Or should we add stabilizer now? Anything else we should look out for?