WD40's Escape V6 Oil Change — 12-step photo walkthrough of the 3.0 L V6, 2003 model.
Step 03 of 12The 15 mm drain plug
Yes, it is in fact a metric bolt. I have seen where some folks have suggested using a 9/16" wrench, but in this case on a 2003 model, it's most definitely a 15mm.