I just picked up a 02 Suzuki Aerio with a 4 cylinder, 2.0 engine. The manual "Highly Recommends" a 5W-30, but a 10W-30 is also suitable. Does anyone have any oil suggestions for this particular application, either dino or synthetic? The manual also calls for 7500 mile oci for regular use and 3000 mile oci for severe use. Thanks in advance.