I currently drive a 2008 Cadillac STS-V with 4.4L Supercharged V8. I thoroughly enjoy owning it. The current EPA rating for this model is 13 mpg city, 19 mpg highway. That equates to 6.7 gallons per 100 miles. So for my frequent 300 mile jaunts, 20.1 gals would be needed without refueling the 18 gal tank. See the issue?
A new Cadillac ELR can manage that with full charge 37 miles and full 9 gal tank for 303 miles or 340 miles total.
A new ATS 2l Turbo, at 21/31 mpg or 4.2 gal / 100 miles can also do 300 miles in 12.6 gal of its 17 gal tank and arrive with fuel left over.
The other interesting contender is the new CTS Vsport wih 420 hp 3.6L twin turbo. At 16/24 mpg or 5.6 gal/ 100 miles it can go 300 miles for 16.8 gals out of its 19(!) gal tank, also arriving with fuel left over.
Read more from EPA: EPA comparison
What do you think? What is the best Cadillac to enjoy for a 300 mile tour?.