The vehicle is an 07 rav4 2.4 awd . 85000 miles on the clock . I use penzoil synthetic 5-20 exclusively . I'm losing maybe a half quart or less < than 500 miles . No leaks visible . Where should i start looking ? Pvc ,egr ... ? Thanks for any ideas you can help out with . I'd just like to have some ideas before headig to the dealers and they say something like valve guides or rings . if that happens , it' s CRV the next day . okay rant over .