Is there an oil additive you can use to unseize a 4 cylinder car motor?

The best additive to a car with a seized motor is a match. Most effective when added through fuel filler.Is there an oil additive you can use to unseize a 4 cylinder car motor?
you can try transmission fluid, that might help.Is there an oil additive you can use to unseize a 4 cylinder car motor?
If it is seized from sitting you can take out all spark plugs and spray a whole lot of W-D 40 in the cylinders. Let it set for a couple of days. This work it's way thru rust and build up from sitting. If it was running when it seized, don't even bother with it. It will do nothing but give you trouble even if you can build it and I doubt that very much.
depends on why it is seized up if it just sat for a long period of time you mite have hope if it seized up while running you can just about rite it off if it just sat along time and is seized up you can try removing the spark plugs and pouring motor oil into the cylinders and let them sit for a day this may losen the rust around the rings and let them move ,ihave done this my self with an old 1960 chevy truck good luck
if it's siezed up to the point that it wont rotate, yer better off buying a whole new engine. there's no lubricant that will free it. the cheapest way to check is to remove the cylinder head and look in the chambers. if there's no goo, the rings have probably welded themselves to the bores and it's never gonna run again. if it is goo, it might be cleanable, but it's better to get a new engine anyways