It is well-known that there is a hiddur mitzvah to light a Chanukah menorah using olive oil. After all, the miracle of the menorah occurred with olive oil.

More on Mitzvah Principles

All of Mitzvah Principles Acting on Inspiration Without Delay Bal Tosif Adding to Mitzvos Choosing a Day of Furlough From Prison Do Pomegranates Have 613 Seeds Doing a Mitzvah Yourself or More Beautifully Doing Part of a Mitzvah Ein Maavirin Al HaMitzvos Is a Beautiful House a Mitzvah Joining Others in a Mitzvah Maakeh Roof Railing Mitzvah Items From Non-Kosher Animals Mitzvah Preparation Counts as a Mitzvah Not Delaying Mitzvos Reward for Inspiring Others Searching for Reasons for Mitzvos Selling the Reward for a Mitzvah Sinning to Help Another Do a Mitzvah Sinning to Save Another From Sin Spending Money to Avoid a Sin Switching to a Nicer Mitzvah Item Tadir Kodem