I have a 2004 Honda CRV that calls for a 5W-20 motor oil. I currently run Mobil 1 5w30 in it. I'm looking at the Amsoil European Car Formula Synthetic 5W-40 Motor Oil. Would this be OK in this engine? The vehicle is driven as a commuter car running 50 miles each way at highway speeds. My interest in this oil is that I could buy 1 type of oil and use it in all of my vehicles (2002 VW Golf TDI and 2005 Jeep Unlimited with the 4.0). I currently use the Mobil 1 10w30 in the Jeep (I know it gives poor wear numbers in the UOA) and either Mobil 1 0W-40, Delvac 1 5W-40, or Castrol TXT 5W-40 formulated for the TDI in the Golf. The VW oil varies depending upon what I can find to purchase locally. The Amsoil I can purchase on-line. The Amsoil should be a good choice for all vehicles correct? I'm of the opinion that a 40 weight oil (10W-40 or 5W-40) would be better for the Jeep too. FYI, Mobil 1 Truck and SUV 5W-40 is hard to find in my area otherwise I'd use it.