Just caught another one on a Model 55 Silver Anniversary brochure on eBay
"By This sign (rad and grill in center) Shall Ye Know it"

Where Are You From? Ottawa Ontario

Do You own a car built by Durant? Dominion built 1932 614 sedan

Not exactly slogans, but ad headlines:

Star
1924
Low-Cost Transportation for Everyone
It's a Star in Quality
THE CAR WITH A BACKBONE
For Your All-Weather Car Get a Sedan STAR

1925
More Power - More Room
Twenty Percent More Power from The Million Dollar Motor

1926
Gaining the Respect of the Nation
More Power And Superior Quality
Clean-Cut, Swift, and Sure

Where Are You From? Grand Junction, CO

Do You own a car built by Durant? 1926 Star Coupe, 1929 Durant 663, 1929 Durant 666