Hello. I have a new to me 2008 Saturn Outlook with 25k miles. I tend to drive only about 9k miles/year and live in a warm/dry/dusty climate (AZ). I wanted to see if anyone has any general recommendations on oil type and OCI. I just did my first oil change and put in PP 5W-30. My inclination was to use 10W-30 due to the warm climate, but since the manual says only 5W-30 I was afraid to deviate. I went with synthetic because I've read about some troubling UOA's on these engines. Generally I like to use a 5k mile OCI on my vehicles, and I'm inclined to follow that here rather than listening to the OLM. The previous owner said he did 5k mile OCI, just changed at the dealer or an lube shop so I'm sure it was dino. I found some posts here recommending short OCI with cheap oil for this engine, but I'm not clear on why. I'd appreciate any thoughts or recommendations. Thanks!