Joe just filled his gas tank and it is all drained by a puncture in the tank and puddled behind car. Everyone near the car would be inundated with gasoline smell.
Mr. Mannix states that the sun is below the horizon. Not long after, the reflection of the sun can be seen on his car.
Connors was born in 1925, making him 42 at the time this was shot in 1967. Leslie (Diana Muldauer) said the big college football game was 15 years ago, making Mannix 27 years old at the time of the college game in which he played.