Diablo Burger
Diablo Burger in Flagstaff, AZ is rated Contains Seed Oils by Oil Watch. Oil Audit (fryer oil: seed oils; cooking fats: seed oils; dressings: unknown; bread: unknown; sauces: unknown).
This restaurant primarily uses seed oils
★4.3·$$·2,427 reviewsWhat to Order
Check First
Ask staff about oils before ordering
💬What to ask the restaurant
Ask a staff member or manager these questions:
"What oil is in your salad dressings?"
Is it olive oil or avocado oil, or a seed oil like soybean or canola?
"Does your bread or wraps contain any oils?"
Some breads contain soybean oil or vegetable oil - do yours?
"Do any of your sauces contain seed oils?"
Things like mayo, aioli, or dipping sauces often have soybean or canola oil.
Got an answer? Help others by updating this restaurant:
Update & earn 50 pointsKnow what they use?
Update this info in the app and earn 50 points when it's approved.
Update RestaurantSkip
Cooked with seed oils
Seed oil mentioned for frying
Seed oil mentioned for cooking
What the rating means
Diablo Burger is rated Contains Seed Oils. Contains Seed Oils means: seed oils in most of the areas audited.
At Diablo Burger: 2 areas with seed oils (fryer oil and cooking fats) and 3 areas not confirmed (dressings, bread and sauces).
Oil Watch audits five areas and weights them: fryer oil 35%, cooking fats 25%, dressings 15%, bread 15% and sauces 10%. A confirmed seed-oil-free area scores in full, a confirmed seed oil scores nothing, an unconfirmed area counts half and an area that doesn't apply is left out. A weighted score of 85 or more is Seed Oil Free, 70 to 84 is Mostly Clean, 40 to 69 is Use Caution and anything lower is Contains Seed Oils. How Oil Watch works
Oil Watch app
See every rated spot around you
The live map and every Oil Audit are free on iPhone. Know what a kitchen uses? Update it in the app and earn 50 points. OilWatch Pro adds saved spots and alerts when you're nearby.
Apple MapsHours
- Monday
- 11 AM – 9 PM
- Tuesday
- 11 AM – 9 PM
- Wednesday
- 11 AM – 9 PM
- Thursday
- 11 AM – 9 PM
- Friday
- 11 AM – 9 PM
- Saturday
- 11 AM – 9 PM
- Sunday
- 11 AM – 9 PM
Hours from Google · updated Oct 26, 2026. Check with the restaurant before you go.
Frequently asked questions
Does Diablo Burger use seed oils?
Yes. Diablo Burger is rated Contains Seed Oils by Oil Watch: seed oils are confirmed in the fryer oil and cooking fats. The dressings, bread and sauces are not confirmed yet.
What does Diablo Burger fry in?
Seed oil. Oil Watch's audit found seed oil in the fryer at Diablo Burger.
What does Diablo Burger cook with?
Seed oil. Oil Watch's audit found Diablo Burger cooks with seed oil.
What hasn't Oil Watch confirmed at Diablo Burger?
Dressings, bread and sauces are not confirmed yet, so ask staff about them before you order.
Where does Oil Watch's information on Diablo Burger come from?
From the restaurant's own website. Oil Watch reviewed the listing and cites its source on this page.
More verified spots in Flagstaff
Closest first, measured from Diablo Burger.
All verified restaurants in Flagstaff →Contributed by our community to help you make informed choices. Since restaurant practices can evolve, we recommend confirming current oil usage when you visit.
Report inaccurate informationGet seed oil free updates