Not to sound like an nice person, but what's the point of overfilling? Just fill it to where it should be and be kind to the environment!
Buyer be aware I guess-another reason I never buy used. Just so you know, anyone that knows me also knows my cars are kept in pristine condition. I don't believe overfilling will damage anything, certainly not to the point it could affect vehicle performance. To each his own. iPhone ?
Each gallon of gas weighs about 6 lbs. Unless I feel that gas price is going up, I just wait until DTE is very closed to zero.