More oil = more power due to better sealing rings. It also means more smoke, more power valve cleanings, and more muffler repacking. On small 2 strokes it makes sense to go for more power but on a 300 I choose to go clean and have less maintenance so I run Amsoil Saber at 64/1 (it's designed for 100/1). Never run an oil at a ratio higher than recommended for that particular oil - lower ratios (more oil) are fine. The guide line I use is no ratio higher than 36/1 for non-synthetic oil, no ratio higher than 43/1 for synthetic blends, and no ratio higher than 50/1 for synthetics unless the maker of the oil recommends it for a higher ratio.
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