My truck was previously serviced and owned bypenske,they used Rottella 50/50 is states that the cooling system has been treated with conversion inhibitors, and at bottom its states not to used conventional antifreeze or SCA. My question is what are conversion inhibitors and SCA. Will be changing antifreeze in a week or so before winter come in. What the best products to flush radiator when I get ready to changed. Next questionis my Air Dryer (Bendix) seem to be blowing oil out of it a liitle , the bottom is wet and it looked liked it might be oil, As always any info will be greatly apprecited

 

good luck

 

Replace coolant with what came out to be safe, are you going to flush your self or have a shop do it? Air dryer is blowing some oil and it may be time to rebuild the air compressor, thats where the oil is coming from. You may want to replace the dryer casrtridge also if you will be running in areas where your airlines may freeze in winter. These is the best advice I have, I had one froze up 3 years ago because driver ran southeast and never blewdown his air system ever. I get the truck back to Indiana in January and cant move it for two days because airlines are froze.