Just brought the 06 Vibe home at 730pm. black vibe base with 141 miles on the odometer. I'm taking pics tomorrow. I got the owners manual and it does say 5w-30 preferred. do not use 10w-40 or 20w-50, but it doesn't say not to use 10w-30. weird. I'm kinda worried with the extra oil capacity, shorter dipstick, and the shorter OCI to 3 months. Could this engine be a sludger?