If the oil is in between the two indentations (one at the top, and one at the bottom of the red plastic) your oil is good. You can also use the digital monitor, but make sure your on a level surface and the car has cooled for a half hour.
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1999 Ocean Blue Metallic Boxster - blueboxster.com
Thanks Rick! Car this morning had a funny idle and almost choked out but quickly went away so I was wondering if the oil was low. If it is is there a auto-store I can get the 10-50W oil to top it off?