I have traded in my old Saturn SL2 and I bought a 2003 Saturn Ion. The engine is very different and I like that it is different. It has more horsepower, and it uses five quarts of oil instead of four. The cooling system also has more coolant. I always thought that an engine should have at least five quarts of oil and an adequate amount of coolant. The oil filter is strange-it is up front instead of underneath the car in an impossible place (YES!) but it is a cartridge type oil filter. You replace a filter element instead of an oil filter can. It makes me think of my Dad's old 1948 Chevy pick-up truck and his old 1952 Ford flathead sedan. My question is, when should I change the oil in this car? Should I do it at 500 miles, 1000 miles, or wait until I reach 3000 miles? At the dealership they said that they use 'Silkene' oil, whatever that is (this is the new Saturn dealerhip in Pueblo instead of Colorado Springs). I have never heard of 'Silkene' and I don't even know if I am spelling it correctly. And would it be better to use conventional oil (like Chevron Supreme) for the first 5000 miles or so? In the owner's manual, 5W30 oil is preferred and 10W30 can be used in warmer temperatures and if 5W30 is not available. In the wintertime in severe cold, 5W30 synthetic oil or 0W30 can be used. Also, can I use a maintenance dose of Auto-RX from the start in the engine?