I've been a longtime Tacoma 2.7 liter engine owner but have seen that the newer V-6's have the "Atkinson/Otto" cycle engine . It seems that this engine switches to the Atkinson and Otto variably by computer . Are any of you owners having problems with it ? I am not sure why Toyota would go to this . I would want to keep things simple. Seems like the Atkinson cycle would cause problems or be inefficient by keeping the valves open longer . Any information is appreciated .