Found this article this morning hope I'm posting in the right place 
Keeping Up Appearances
Making sure your car is free of grease and grime might be the best way to ensure its value over time.
By Mike Meredith of MSN Autos
http:// editorial.autos.msn.com/article.aspx?cp-documentid=1143254&icid=autos_1363>1=22009
(Remove the space between // and 'editorial' and paste into your browser to view the link)

Keeping Up Appearances
Making sure your car is free of grease and grime might be the best way to ensure its value over time.
By Mike Meredith of MSN Autos
http:// editorial.autos.msn.com/article.aspx?cp-documentid=1143254&icid=autos_1363>1=22009
(Remove the space between // and 'editorial' and paste into your browser to view the link)