Trailing behind

Early Commodores with independent rear suspension suffered from high tyre wear because of geometry changes they went through as they worked. Anything that made the rear lower, such as putting the weight of a trailer on it, made it worse. So the advice you received was correct and you would have to replace tyres more often on a Commodore built before the VX Series II. The VX Series II saw the independent rear suspension improved with additional links to particularly control the changes in toe-in as the wheels moved up and down. This meant Holden could change the suspension settings which reaped benefits in tyre wear, as well as worthwhile improvement in ride, handling and stability. If you are looking to buy, then I would recommend the VX Series II, but if you have a car you want to improve, then take it to a suspension specialist who will be able to suggest ways to solve the problem.