if you read that carefully he says he suggests to run it at 32:1 which basicly means he knows motorcycles and not airplane engines. i would think his words were based on giving a margin of safty. i dont understand the need to run such lean mixtures that everyone trys for anyhow. 80:1-100:1 the motors run good at 32:1 and have great protection. the rings seal better and the seals seal better which makes the motor run better and last longer. if theres a reason other then cleanup, id like to hear it. also i believe the engine destroying hard carbon deposits are more likely to form from lean mixtures. the more oil in the cylinder, the softer the buildup seems to stay.[sm=confused.gif]