Test drove a used 1999 mitsubishi diamante vin # [xxx] at the wayzata auto center bargain lot 1805 east wayzata blvd., wayzata, mn 55391on or about 12/26/02. the car was showing approx 57,000 miles. while my wife was driving at highway speed she made a lane change and the car entered into an oscillation which caused me to question her driving and then drive the car myself. i repeated the exercise and noticed the vehicle had a tendency to enter into a pronounced oscillation any time a turn was attempted at cruise speed. we immediately returned to the dealer and pointed out what i considered to be a serious safety issue to the salesman ([xxx] . i later wrote an email to [xxx] at the village chevrolet dealership who originally advertised the car in traderonline. i have yet to get a response stating they looked into the issue. by the way, i'm a qa auditor, mechanic and pilot, comfortable with the personality quirks of most vehicles. while bothersome and a deal killer for us, i feel this issue would be a serious problem for inexperience drivers in less than ideal road conditions. i have yet to get a response from the dealership saying they either investigated or took action on the problem. information redacted pursuant to the freedom of information act (foia), 5 u.s.c. 552(b)(6). *tr