[fabsroman]

I don't think I would try that with Amsoil no matter what people told me. The investment just isn't worth it for me. If a car runs for 200,000 miles and I change the oil every 5,000 miles with Mobil 1 at $5 per quart and $10 for the Mobil 1 filter (i.e., $35 per oil change), the total cost to me is $1,400. To keep a car on the road for well over 10 years at that cost for oil changes, I'll change the oil every 5,000 miles. If I can get my Taurus to 18 years, the cost of the car will be less than $1,000 per year to me, not including maintenance, gas, insurance, etc., merely what I paid for the car.