William Brammer wrote:
Any suggestion on a good gasoline pump to move gas from one vehicle to
another in a garage?

My wife always fills up at the most expensive stations while I get my
gas at the least expensive I can find using Gas Buddy.

I'd like to weekly (or so) transfer about 15 gallons (or so) from my
tank to hers in my garage (or just outside the garage).

Any suggestions for a good pump for gasoline?

Just about any pump made for the purpose should work.

There ARE alternate ideas, some of which have been mentioned.

My favorite would be the reverse of what you propose: Remove some (amount
of) gasoline from HER car and put it in YOUR car. As the price she must pay
to run errands increases dramatically, she may, on her own, move to reduce
her expenses.