Originally Posted By: heypete
To summarize what is already an excessively long post, "What would be a suitable oil for this vehicle, given mostly-average driving and 5,000 mile oil change intervals?"
I appreciate any input you have to offer.
You are, relatively new to the forum, welcome.
If I were you, since this is a brand new car, go with any reputable 5w20 and change the oil every 5k miles as per your warranty requirements.
In Arizona does it stays warm year round? Sounds like non-severe service for me.
I would bet a reputable 5w20 every 5k miles will serve you well.
"As she's a high school teacher (and I'm going to be starting graduate school), money isn't going to be growing on trees for us for some time. Thus, we want to follow the service schedule and do oil changes at 5,000 miles, not spend a huge amount on pricey oil (though we have no problem with modestly-priced synthetics like Mobil 1, but if something cheaper protects equally well, we'd prefer that), yet be able to give this car to our as-yet-non-existent kids and have them drive it into the ground."
I think if you cost out gasoline, insurance, wear&tear items, and depreciation, you'll find that a bi-yearly oil change factors in very little of the operating cost! Besides, a brand new RAV4 isn't a cheap car by any means!