Oil Tips -original author "ClippedWings" - submitted by Al Hicks

A few good tips:
* Good oils burn clean, at 15:1, 30:1 or 50:1 and at different mixture settings.
* Cheap oils leave carbon deposits because they don't burn clean, higher oil % and richer settings will result in more deposits.
* Good oils have better lubrication properties, an excellent synthetic oil at 50:1 may have better lub. than another oil at 25:1. Using an excellent oil at 30:1 will increase the engine protection and margin of safety.
* Carb settings can be rich or lean at any given oil %, but higher % of excellent oils at lean carb settings will protect the engine better.
* There is no direct relationship between the power output of an engine and the % of oil in the mix; i.e. having 3% more oil doesn't rob 3% power, sometimes it is the exact opposite, there are too many variables (engine design, clearances, tolerances, metallurgy, operating temp., etc..., etc...).
* There is a direct relationship between the power output and the richness settings of the mixture (assuming all other variables stay the same).
* There are many excellent oils around so using cheap oils should not be an excuse. I am using synthetics such as Mobil1 Racing, Stihl Ultra HP, Penrite 2C Racing, and semi-synthetics such as Husqvarna XP and LS+. All good oils at ratios of 30:1 or more and never had an engine fail due to lubrication.