CAN AUTOMATIC TRANSMISSION FLUID (ATF) BE ADDED TO THE DIESEL FUEL TO INCREASE LUBRICITY AND TO HELP CLEAN ENGINE DEPOSITS?
It is not a good practice and likely will cause far more problems than it could solve. Using ATF in this way is something of an "old truckers tale" and has been used on everything from Volkswagens to Class 8 trucks. Another erroneous strategy is to add old or new engine oil for lubricity. The problem with these "additives" is they are specifically designed to resist high temperatures and burning. As a result, if they are added to diesel fuel they leave behind ash, heavy metals, and other deposits that can easily cause costly damage to fuel injectors and other sensitive engine components. The best practice is to use quality diesel fuel additives like Stanadyne’s Performance Formula. They are designed to clean and lubricate engine components without leaving behind residues that can be hazardous to your engine’s health. The bottom line is, don’t add anything that is not specifically designed to be combusted in the engine.
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