G13 Antifreeze into an M20, any issues?

[dimebag_from_hell]

Hi guys,
Working on an e30 here which has just been actively flushed with the garden hose to get all the old coolant out of her.

I had a few bottles of bmw coolant left over but it turns out my old man has swiped them.

I have some g13 concentrate here which is phosphate, silicate, nitrile, borate and methanol free.

Anyone forsee any issues using this? The issue I have is I am working from tomorrow right through until next saturday so wont chance to get near the car again for a week if I have to down tools.

[Speedtouch]

I would be inclined to use it if it's all you have available on a Sunday - on the basis that any anti-freeze is going to be better than none at all, particularly during a cold snap.

You can always flush and refill with the 'correct' stuff at a later date, if you find out it's not suitable.

[dimebag_from_hell]

I am not using it as a daily so it doesn't matter that much but I'd rather have it up and running than have to wait a week to get at it.

Anyone got a reason why it shouldn't be used? It's phosphate free so I thought it might be ok.