Mike Triggs wrote on Saturday, November 13, 2010 - 08:16 pm:Regardless of whether money's an issue (it is for me, as a mere Public Servant!) it would seem a waste to use an oil which is formulated for a 20-25,00km change interval, and take it out and throw it away at 5000km. I'm no greenie, but I do think about the use my dirty oil is put to (once I used to burn it as I was heavily involved inland clearing). If it is to be recycled, well and good. Even synthetic oil is a "finite resource".
As for plugs and filters, opinions vary, but Toyota filters are favoured, and plugs depend on how often you want to change them. Copper plugs work fine but need changing often (a big job on some of our motors) while platinum and iridium plugs have a much longer service life (and higher initial cost). Given the price of labour (I'm too old and crotchety to bother doing my own plugs these days) the Iridium plugs get the nod for me.