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Chain vs chain · Burger King vs Sonic

Burger King vs Sonic: which has less seed oil?

Sonic has less seed oil overall: 3.1 g of polyunsaturated fat per item against 5.8 g at Burger King. 21% of the items at Burger King have 10 g or more, against 11% at Sonic. Averages cover every menu item, so the order you build matters more than the logo.

Side by side

Burger KingSonic
GradeBA
Average per item5.8 g3.1 g
Items counted257383
Fryer oilcorn and cottonseed oilsoybean oil and vegetable oil blend
Average main12.2 g9.0 g
Middle main10.3 g8.0 g
Mains under 1 g0%2%
Mains under 3 g5%17%
Mains under 5 g16%28%
Items at 10 g or more21%11%
Cleanest orderBurger Patty Only (No Bun) (1.1 g)Burger Patty Only (No Bun) (0.8 g)
Item to skip20 Pc. Chicken Nuggets (37.1 g)SuperSONIC Bacon Double Cheeseburger (26.8 g)
Fries items, average8.7 g across 412.3 g across 8
Chicken items, average13.2 g across 3510.2 g across 11
Burger items, average12.4 g across 4213.0 g across 19
Oil history
October 2008: Burger King finishes its trans fat free oil rollout
July 2007: Burger King sets a deadline to drop trans fat oil
No documented oil switch on record yet.
MoreReport card
Fryer oil answer
Report card
Fryer oil answer

Where the gap sits: fries items average 8.7 g at Burger King and 12.3 g at Sonic (4 items against 8); chicken items average 10.2 g at Sonic and 13.2 g at Burger King (35 items against 11).

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Common questions

Which has less seed oil, Burger King or Sonic?

Sonic, by 2.7 g per item on average.

What oil do Burger King and Sonic cook with?

Burger King: corn and cottonseed oil. Sonic: soybean oil and vegetable oil blend.

What is the cleanest thing to order at Burger King and at Sonic?

At Burger King it is Burger Patty Only (No Bun) (1.1 g). At Sonic it is Burger Patty Only (No Bun) (0.8 g).

How much of the Burger King and Sonic menus is under 1 g of seed oil fat?

0% of the 93 mains at Burger King and 2% of the 60 mains at Sonic have less than 1 g of polyunsaturated fat.

Same numbers as the report cards. How we work it out.

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