Auto-Rx uses oil as a carrier there is no problem with any oil's additive package after Engine has been cleaned. MD has no problem as both oil and Auto-Rx working in a clean enviroment. MD will keep it clean much longer making your oil last for more miles. Plus the added benifits of keeping compression-combustion-ring packs performing at peak levels.
When you rinse your engine with a synthetic oil the complex additive package has one additive whose job it is to hold oil to metal (thats self defeating when you want to rinse contaminates off engine parts) this is the only time Auto-Rx has a problem with an additive.And we make adjustments for our synthetic oil friends. Feel free to post this. Frank
