You don't really have to worry about how many grams of what is in there. It's more important to read the ingredients and see if it's made with good fats or bad, if there are added sugars, and what other crap they might have thrown in there for good measure.
Sometimes there aren't great choices at those places and you have to do the best you can. I'll go for oil and vinegar if it's there. Otherwise, I'll usually have Bleu Cheese or Italian. Ranch is usually okay too, but I don't care for it. But I always read the ingredients if I can. Particularly in vinaigrettes or Italian, they sometimes throw in extra sugar.
Life's a journey, not a destination.
It's easier to stay on plan than to get back on plan.