I have always been told that eythleen glycol is very hard on engine berings. I have built several small block pushrod engines. When compression is high they blow head gaskets. We raced thes with water wetter, water pump lube, and plain water to avoid eythleen glycol fing its way to the oil pump in the event of a blown head gasket. Ford small blocks had 10 head boltsonly (vs 14) and were very apt tp blow gaskets.