***** Just my personal opinion *****
But if I were you using the full-synth Mobil1, I'd go to 6month/6K mile OCI's. At the least - and if you have the ducats - 4mo/4K mile change intervals.
Every 3 months/3K miles is fine with dino juice, maybe even aggressive to some folks, but synth should/does hold up longer for a longer OCI.
Also, the filter - use a top quality oil filter. NAPA Gold, Purolater Premium are two excellent choices that jump to mind. Delco makes an "Ultra" branding that is great, Motorcraft's FL1 is a legend, but have no idea as to either availability for a RAV.
JMHO!