Shell full synthetic 5w-20 ( SN/GF-5 ) : Used Oil Analysis ( U.O.A.) for '08 sedan ..

[Hershey]

Looks quite good . Column 1 is the SHELL full synthtetic 5w-20 ( SN/GF-5 ) , 2 is SHELL full synthetic 5w-30 ( SN/GF-5 ) , and the 3 is PENNZOIL Yellow Bottle ( conventional ) 5w-30 ( SN/GF-5 ) . The Toyota ( Denso ) oil and air filter are used at all times . There was 40,080 miles on the engine when the oil / filter were changed and the oil sample taken . The Shell synthetic was applied at 35,650 miles . Time on oil : 9/18/11 > 1/24/12 . Will likely get another case ( 6 bottles ) of the SHELL full synthetic 5w-20 next month at BJs for $17.99 ( $3 a quart before tax ) . This sample was $4 a quart during a sale at BJs . Here's the sale at BJs , http://www.yarisworld.com/forums/showthread.php?t=38096 . Your take on the performance of the 5w-20 ?