Hi, I was wondering if valve guides are helped by use of upper cylinder lubes in fuel. I recall reading that UCL`s help to lube parts that are in the path of the fuel stream, which in theory would be valve guides as valves more through the fuel stream. If I have an engine that is known to have premature valve guide wear will I get some extra protection by using UCL`s. I`m not pushing any particular brand, just asking about their benefits in general. Thanks for reading, any replies would be helpful.