PENNZOIL:suv, truck, minivan synthetic blend motor oil >

thinking of using this synthetic blend (around 30% synthetic / 70% reg. oil ) which claims to be used for passenger cars as well . After switching from regular oil to MOBIL 1 at 74,000 miles I've been debating to go with a full or synthetic blend for the next oil change of our 2000 Chevy Prizm ( Corolla ) and the 2007 PRIUS at either 3,000 or 6,000 miles ( break in period ) . Would like to get your input on this issue , info is available at www.penzoil.com/products/motor_oil/synth_blend.html . THANKS AGAIN