I look at that chart and just laugh. Why in the Hell would anyone buy a new car these days!?
0% APR + new car warranty + lemon law protection + 0 miles > whatever APR you get on a used car + 30 day at best warranty + 40k-60k miles
I've done both new and used and have had a variety of experiences in both cases. But I probably wouldn't be n a big hurry to buy a used car at this point. I looked around when I bought my last vehicle and the price savings associated with modest mileage used vehicles just weren't especially compelling. (And I wasn't even financing.)