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Chain vs chain · McDonald's vs Sonic

McDonald's vs Sonic: which has less seed oil?

This one is close. McDonald's averages 2.9 g of polyunsaturated fat per item and Sonic averages 3.1 g, so neither has a real edge on seed oil overall. Averages cover every menu item, so the order you build matters more than the logo.

Side by side

McDonald'sSonic
GradeAA
Average per item2.9 g3.1 g
Items counted255383
Fryer oilcanola and soybean oilsoybean oil and vegetable oil blend
Average main10.7 g9.0 g
Middle main7.9 g8.0 g
Mains under 1 g2%2%
Mains under 3 g14%17%
Mains under 5 g25%28%
Items at 10 g or more7%11%
Cleanest orderBurger Patty Only (No Bun) (0.4 g)Burger Patty Only (No Bun) (0.8 g)
Item to skipSpicy Chicken McNuggets (40 Piece) (67.1 g)SuperSONIC Bacon Double Cheeseburger (26.8 g)
Chicken items, average20.8 g across 910.2 g across 11
Burger items, average4.8 g across 913.0 g across 19
Oil history
May 2008: McDonald's fries go trans fat free in the US and Canada
January 2007: McDonald's settles on a canola based fry oil
No documented oil switch on record yet.
MoreReport card
Fryer oil answer
Report card
Fryer oil answer

Where the gap sits: chicken items average 10.2 g at Sonic and 20.8 g at McDonald's (9 items against 11); burger items average 4.8 g at McDonald's and 13.0 g at Sonic (9 items against 19).

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Pick your meal, sides, sauces and drink in the app and see your seed oil total before you order. It logs to your day in one tap. Free on iPhone and Android.

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Common questions

Which has less seed oil, McDonald's or Sonic?

McDonald's, by 0.2 g per item on average, which is close enough to call it level.

What oil do McDonald's and Sonic cook with?

McDonald's: canola and soybean oil. Sonic: soybean oil and vegetable oil blend.

What is the cleanest thing to order at McDonald's and at Sonic?

At McDonald's it is Burger Patty Only (No Bun) (0.4 g). At Sonic it is Burger Patty Only (No Bun) (0.8 g).

How much of the McDonald's and Sonic menus is under 1 g of seed oil fat?

2% of the 51 mains at McDonald's 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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