Some of us may already be hurtling down the roads of America in an Ultra Van or Hoonabago in celebration of Memorial Day. More still may have decided to avoid the crowds and stay put. If you haven't left yet, then check the tire pressure before loading up the Town & Country wagon with 500 pounds of cargo. Make sure there's some air in the spare tire to save any roadside swearing. Popping the hood and checking the oil is always a good idea. If the oil has had it and you're sticking around for the weekend, put the car up on some ramps or jack stands and change out that old oil and filter for some some of the good stuff. And even though we gripe about the high price of gasoline, taking a moment to remember what Memorial Day is really about costs nothing and means a great deal.