Capriotti's publishes no current nutrition document. From an archived guide, canola oil is applied to 60 of 209 dishes and a Ken's mayo containing soybean oil, HFCS and EDTA is on 72 of 209. Their Russian dressing adds HFCS, sodium benzoate and propylene glycol alginate.
Capriotti's is the heaviest seed oil exposure of the sandwich chains I looked at, and almost none of it is disclosed by Capriotti's itself. Their own site no longer hosts a nutrition document at all - it moved to a DoorDash storefront and the old PDFs 404. From the archived guide, canola oil is applied directly to 60 of 209 dishes, and their mayo is an exact match to Ken's KE0898 Extra Heavy, whose published label is soybean oil, distilled vinegar, egg yolk, high fructose corn syrup and calcium disodium EDTA - that mayo is on 72 of 209 dishes. Their Russian dressing matches KE0815, which carries high fructose corn syrup twice, sodium benzoate and propylene glycol alginate. There is a fryer covering 9 items but the shortening's fat is never named. Treat the counts as indicative rather than exact - the archived copy was truncated.