Which is better an H6 or 2.5? I constantly hear people with 2.5 having to replace the HG or swap the motor out. And that the H6 doesnt have problems with the HG or having to change the timing belt every 105k (correct me if im wrong). The transmissions are the same in 2.5 and H6. The mpg's are off by 1 or 2. Is this true?