Some plastic contact · Some premade food
Most food made fresh, other than tots and fries. Food touches plastic, but most cookware is metal that stays plastic free.
Four categories, weighted. Seed oils count three times as much as plastics or ultra-processing, so a poor seed-oil score pulls the overall number down hardest.
Full methodology: how we score restaurants.
Some plastic contact · Some premade food
Most food made fresh, other than tots and fries. Food touches plastic, but most cookware is metal that stays plastic free.
Sonic's own Summer 2026 ingredient guide shows the fryer shortening and the bun oil are both soybean oil, and even the beef patties carry hydrogenated soybean oil, so seed oil is essentially unavoidable here. 92 of 106 food items also carry an additive, and the only 13 items clean of both are condiments, fruit add-ins and plain produce.
Sonic publishes a real per-item ingredient statement guide (SUM26, 7 pages), and it settles the question. The Fryer Shortening is listed outright as "Soybean Oil, Hydrogenated Soybean Oil with TBHQ", and there is a separate Bun Oil, also soybean oil with TBHQ, that goes on the buns - so a burger and an order of tots are both seed oil before you add a single topping. All three beef patties (Burger Patty, Jr Burger Patty, SONIC Smasher) carry hydrogenated soybean oil inside their encapsulated salt. Of the 106 non-drink items, 43 name a seed oil outright and 92 carry an additive. Only 13 are free of both, and every one is a condiment, a fruit add-in or plain produce - mustard, honey, apple sauce, lettuce, tomatoes, diced onion. Dyes reach past the slushes into the food: the Brioche Bun lists Red #40, Yellow #5 and Yellow #6, and both the Zesty and Signature Cheese Sauces list Yellow #5 and #6.
Tallow reviewers check Sonic Drive In on four things: whether it cooks in seed oils, whether the menu carries artificial additives, whether food touches plastic on the way out, and how much of it arrives premade rather than made in the kitchen. The answers to each are scored below.
Yes. Sonic Drive In scores 0/100 here — reviewers report heavy seed oil use.
Yes. Sonic Drive In scores 0/100 here — reviewers report a lot of artificial additives.
Not really — Sonic Drive In scores 7/100, a poor score. Tallow rates what a kitchen cooks with, not how many calories are on the plate.
Yes. Sonic Drive In scores 30/100 here — reviewers report mostly premade or ultra-processed food.
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