Did you ever think that perhaps your car has a lot more KMs than what the odometer reads? The Ford Odometers are very simple and easy to alter. If you bought the car before the law became effect (must show mileage at registration and on the used wehicle package), then there is a really good chance that someone rewound your odometer. You shouldn't have problems like you are descibing with only 150K.

'98 Contour 2.5L, 5-Speed, 100% stock '85 Porsche 928 5-speed, Supercharged & Intercooled 12.87sec @ 109mph