What incorrect statement relates to LP/propane gas and its effect on valve rotation?

The statement regarding LP/propane gas indicating that it causes more combustion deposits is incorrect because propane is known for its clean-burning characteristics. When propane is burned as a fuel, it typically produces fewer combustion deposits compared to gasoline. This property is largely due to its chemical composition, which results in a more complete combustion process. Unlike gasoline, which can leave behind carbon and other residues, the combustion of propane generates mainly carbon dioxide and water vapor with minimal particulate matter.

As a result, the use of propane can lead to cleaner engine operation and reduced maintenance needs associated with carbon buildup on components such as valves and injectors. The other statements accurately reflect the benefits of using LP/propane gas in terms of lubrication and combustion efficiency; they highlight its advantages in comparison to gasoline, such as potentially improved lubrication efficiency and a reduction in combustion deposits.