The coupon was just a $5.00 off with no strings. Had it said bulk oil only I would gladly have paid the difference to get 5w20.
Close as I can can figure it was an extra 1/2 qt, about 4.2 qts, but on that stick that's twice as high as the low point to high point. I've never put that much in, so it looked very high. Good point though about overfill since many people don't check. Though, Ive tried to teach my daughter how to check oil level on dipstick, and keep an extra qt. of oil in the trunk.
Thanks all for the input, my conversation with the owner will be much more civil than it might have been Saturday.
As for the struts, the car's ride is not as tight as new, but no wheel hop.