So I just put an ls motor in my teg and went to drain any old oil out. I recieved a huge suprise with it being super watery! I wanted some advice on what you all would do in this situation. I was planing on buying some thick oil and build some oil pressure and then run a compression test. And obviously if it came out all screwy change the head gasket. But if the compression came out fine go ahead and start it up. Then drive it around the block and change the oil again.