Thanks Andy. Probably be a couple of weeks before I find time to do anything.

I just read the MSDS and technical details for those Red Line boosters. They seem to give a similar order boost in Cetane numbers to Amsoil. (3-9 for the 85 Plus). Have also emailed the Oz distributor of Amsoil to see if I can get Amsoil Cetane Boost given that its known to work.

The redline products all contain Octyl Nitrate as well.