I have a 1988 Volvo that hasn't been run in over four years and I need to know what has to be done before I start it. I did the oil change and I know about the oil and fuel filter replacements. I got the radiator filled and I think I'm almost ready to start it after replacing the spark plugs, but here's what confuses me. I've heard from some sources that the gasoline has to be drained and replaced, but I've heard from others that just topping off the tank a little is fine for now. Do you have any input?