Hi, bush (Not George W., I presume...)! I have a LiteOn SOHD-167T and an 8x burner, and I can do 8x on-the-fly without any problems. LiteOn reads burned DVDs (both + & -) at 8x (actually, 5.5~8x), and my Toshiba drive burns them at 8x ZCLV (4x-5x-8x). So, if a burned disk is clean and a decent-quality-burn, there shouldn't be problems, cause LiteOn always reads the disc a bit higher than the burner writes it. Furthermore, I updated the Litey with a patched firmware and raised the reading speed for burned discs to 12x (or is it 10x...nevermind). If your system is fast overall, it should work flawlessly.