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The fuel/oil ratios displayed in column E are baseline values that vary depending on the type of cylinder cooling and the max RPM. Just put an x at the appropriate cell next to the variable that matches your engine. To select a different variable click onto the existing x and press the delete key. Then click onto the appropriate cell and press x and then the enter key. Click onto the displayed RPM and enter the max RPM that you rev to, not the absolute max the engine is capable of.  The ratios displayed are baseline which means you can vary from it although I would discourage anyone from using much less oil than the baseline. I'd prefer people using even more oil for more protection. Below you can see that the spreadsheet has 4 spaces for 4 other oils that you can enter if you know their specs.  HOME |