thats because the dealers on get paid back for the loaner on flat rate time, not loss of use (wait for parts).

i think 6 hours flat rate is what a dealer uses to give a demo. I always argue to get the loaner if im going to need it, i got on for my fuel pump it took 10 days to get one from korea.

In you situation i would try another dealer, might not be easy in your area, even after gm closed half the dealerships in our area i still have over a dozen in a 30 minute radius. But i think if you found someone who could fix the car so you can get to drive it, its not as bad as you seem to think.

cr and jd are not car people, maybe 1 in 20 american are, and 1 in 200 (making up my own statistics) are able to fix most thing on a car.. even fewer can actually diagnose and such with a vast knowledge of cars.. cr and jd market to the other 19 out of 20 people who "dont know" or "dont care" JD at least hires someone to look at the car, CR has written reviews on car without ever seeing one in person. Neither of them go beyond a basic first impression like Car and driver, or some other CAR magazine reviews. JD power is often survey based. Did i get a survey aboutthe aveo? Did you? Anyone else here? not wonder its not a top pick.. When i bought my audi, I got a jd power survey in the mail FROM audi, with a $5 bill stapled to to to pay me for my time to fill it out to let them know how satisfied i am with the car.. I have heard JD accepts "informal" and 3rd party reviews too, not sure if that is true, but if toyota and honda send in 3000 surveys, and gm sends in 100 whose going to win?

my take.

good luck with your car.