rod
Retired 23 years
I remember my dad falling for that and other miracle gas saving tricks back in the 70's when gas prices went over $.50/gal. I bought a pack of cow magnets to keep the gas door on daughters Rogue to stay closed. Kids love to play with them also.
In the 60's my Dad had a 1940 Buick Business Coupe that was his pride and joy that he put some kind of weird extra air cleaner attachment on. It had a foam filter on it that had to e cleaned about once a week. He swore it increased his mileage.