Re: 2011 Toyota RAV4 smokes on startup
If perhaps the rings are "gummed up" and sticking in the ring lands and thus not sealing properly. I'd try one can of BG EPR (pt. #109, used to be called BG 109) engine cleaner. You put this in the oil just before you change it and let the engine idle for about 20 minutes (don't drive the car, just let it idle) and drain it out with the old oil. It will loosen up the sticking rings. Put in new oil and filter like always and it can really help solve that type of problem. I've had very good luck with the BG products, especially the BG CF5 and 44k fuel additives. Check out their catalog of products on line.
'69 Z/28, Lemans Blue/White Stripes, DZ302, Tremec Magnum, 4.10, Procar Elite Seats,
Custom Upholstery, Dynatech headers, 17" VWW V45's, 235/45, 275/40, C5 Front Brakes