cairns a bit warmer than here for sure. mate lives at port douglas. just uses recod. oil in his and he flogs them. just choose your preferred and go with whats said to use. oil choice is a huge can of worms, everyone has a fave. not worth talking about. i use ryco rmz102 filter and synnex 3000 gulf western. around $45 for a change. repco have both. works fine for me. 4litre of silkolene will cost 75 plus a top up bottle to fill. gearchange is better with synnex than silko. yes, ive tried both.