Hi Dave: How are you doing? I have always thought Protek had some tiny amount of "oily lubricant" going along with the nice clean solvent. Don't you get that impression? Whatever it is, I sure like it. However, I have literally dozens of cans of Ronsonol around the shop and in my kits (4 of them) too. On some Ronsonol bottles, I mark "50/50" meaning 50% Ronsonol and 50% Protek. Protek seems much stronger and more potentially troublesome if used in the extreme (a thing I woud NEVER EVER DO)...and have never ever done in my entire life. HONEST! And you, David Ilvedson, can attest to that . Ricard
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