Hey Kennedy,
I apologize for not getting back sooner. As you know life happens.
Thank you very much for your input. I will definitely look into the filter restriction gauge.
I am currently adding Diesel Kleen (white bottle) at just about every fill up. Would you consider this to be a respectable product? 30 years ago when I was driving a Mercedes box truck halfway across the country on a regular bases, we were not using any additives. So what I am saying here is that, yes I know today's fuel is low sulfur and my engine was designed for higher sulfur. Should I keep using an additive?
I apologize for my ignorance in this matter. Life has lead me to know my limitations and defer to experience whenever possible.
I again appreciate your time and experience.
Thanks,