Many grocery stores that have fuel stations give extra fuel points for gift card purchases.

For example, at my Safeway store, I earn $1 off per gallon in fuel for every $500 in gift card purchases (limited to $1 off per gallon max).

So, if you have a points earning card that is favorable at grocery stores to begin with, can get a few % more by using the fuel program. (i.e. assuming 15 gallons/fill up you earn additional 3% this way).

Warning - fuel points expire at the end of the following month at Safeway, so you would not want to probably do all 10K in one month unless you plan to have 20 fill ups before expiration...