I have mushroom chow mein from my chinese takeaway (i'm not veggie but I love this!) and I class it as free...
Not sure if it is but a chicken chow mein is 6 syns on green for the chicken so I think mushroom chow mein should be free, after all it's mushroom, onion, beansprouts and noodles - no gravy just some soy sauce.
I would ask them to cook it in less/no oil and then drain it at home if it still looks oily. Stick to plain boiled rice/noodles as the main bulk.
[FONT=Arial, Helvetica, sans-serif]Chinese Restaurant, Stir Fried Mixed Vegetables, average portion 340g serving [/FONT]