I've got a 2010 toyota prius. I'm on a road trip and changed the oil right before I took off, unfortunately I was in a hurry and didn't realize I overfilled the oil. (likely 0.5-1.2quarts overfilled ) when I realized it was overfilled I did some Google searches and saw suggestions to siphon through the dip stick, unfortunately it was 4a.m. And the only open place was Walmart and they didn't have a pump with a narrow enough tube.
I did more research and found that it shouldn't cause a problem unless it starts frothing which it wasn't. Today I've taken turns with my wife and driven all day checking the dip stick religiously and haven't seen any frothing, we are getting slightly worse mileage than normal although I chalk that up to our trip raising in elevation (Texas to Utah)
Anyways, during this last check I saw slight frothing on the dip stick, I am 400 miles from my destination, at which point I can drain the excess oil, but am now worried that driving will damage my car, is it likely I have already damaged it? Is there anything I can do in the middle of nowhere to help the problem and am I safe to drive? If I stay put for a while will the frothing go down? Thanks in advance for any help.