Regarding your question about whether or not it is normal for there to be oil consumption during the clean phase, I would submit the following. We would expect oil consumption similar to what the motor consumed prior to the addition, until the product had time to work. By work I mean time enough to dissolve the hardened deposits causing the piston rings to be bound together, or to dissolve deposits in the valve lifters. Until the rings are freed up totally oil consumption may persist. Normally we would expect the ring deposits to dissolve after running 750 to 1500 miles, or roughly 825 to 1600 KM. You may have lost some oil prior to rings being cleansed. So by all means top off the oil, then take a close eye on the dipstick and gage the consumption from this point on.
Also, until the rings are freed up and creating a better seal with the cylinder walls, fuel dilution would still occur. And in cold weather, it takes quite a bit longer for an engine to build up heat to full operating temperature. Before the motor reaches full operating temperature, the computer on board will make the engine run a rich fuel to air mixture. This will promote higher levels of unburned fuel slipping past the piston rings. If you are doing a lot of short trip driving this will compound the issue. In theory the PCV valve should allow these unburned fuel vapors to be vented back through the intake system of the motor for a reburn. If the PCV valve is sticky or stuck closed then the gasoline vapors are trapped inside the motor cavity. One other thing to check would be that your thermostat in the cooling system is working correctly. If it won’t close properly then the motor never has a chance to build heat up to normal operating conditions and the computer will keep calling for a rich fuel to air mixture.
The real test will be in the rinse phase of the application. Which is when you drain the Auto-Rx fortified oil and refill with just oil and a new filter. This is when you can get a true assessment on what effect cleaning the motor internals has accomplishe.
