Maximise performance for single file upload to Google Drive

Uploading a single file to Google Drive doesn’t use a fraction of the upload bandwidth. If I upload eight files simultaneously with --transfers=8 then its does. Is there a way to maximise upload performance with a single 2GB file. It’s the same whether at home (50Mbps/5Mbps) or my partner’s place (35Mbps/2Mbps). This is all on OS X El Capitan or macOS Sierra.