Yes, Pat Brady's comic relief was pretty lame. But the fault lies in the director and the writers, not Mr. Brady. It was silliness obviously created for the show's audience: kids. Watching these shows today, I sometimes get frustrated over his character, which was certainly over the top silliness. But, as a kid, I was thoroughly amused and didn't see him through adult eyes, so it was effective as it was meant to be to the audience it was meant for.
As far as gas stations go, for Nellie Bell (Nelly Bell?) (Nellie Belle?) (NellieBell?) (can't seem to find the definitive spelling), it really never occurred to me as a kid. It was just accepted that, somehow, Pat's Jeep always had access to fuel. lol. Which, if I may digress a bit, is why adding so much realistic violence from the 60s, and later, on TV and movies was so damaging to children, I feel. The violence and actions of criminals on TV and in movies, since the 60s, makes some kids think that that's normal and, apparently, acceptable. The results are in today's news headlines.
The entertainment industry would be doing a great service to today's children if they'd produce shows and movies that are 'realistic' without underscoring, amplifying and promoting violence, and making criminals of all ages seemingly successful and heroic. While PBS provides great programming for very young kids, I can think of no regular network programs for preteens or teens that don't exhibit violent, criminal behavior in at least one character. We need more shows that present old-fashioned values that helped bring Americans together, not values that create divisiveness and glorify antiheroic behavior.