Thanks for your input Blackwater. I'll need to wait for the good weather to try the ozone generator as the Chevy is in an attached garage and I'd rather have it out on the driveway. In the meantime I will try the Febreeze.
The smell seems to give me a headache whenever I drive the car. I have checked for exhaust leaks and other noxious smells from the motor but cannot find anything else but this old car odour.
