Hey blade, im looking to run a mini coax cable the same way you did. I assume it wasn't too pinched going under the hard top? Did you have concerns with the seal or add any foam? Was there a groove the wire sits In?
Found the factory page for it, looks like they do air and fuel as well. Haven't heard anything bad about champion. https://luberfiner.com/part-number/?partno=P1085&partkey=008794229#parentHorizontalTab1
If a system was off-road only(key words here) and the egr cooler was not passing coolant and there was no egr then yes, it would not run as hot. The oil can take it, engine I'm confident they designed it to run warm for emissions and efficiency...
Same contents in the stanadyne treatment and the edt, just different quantities, winter blend or not.. Check the wear scars compared to straight diesel. Less wear on the part equates to longevity. Also the funding of the lab wasn't done by the product. Also SGS is an independent lab, not sure...