Yesterday, after Donna returned from her morning bicycle ride, I took the scooter over to the NAPA store on Main Street. They had ordered coolant test strips for me and they were in. Coolant test strips are strips of paper with three treated pads on them. They work like litmus paper. One pad tests the PH of the coolant, one tests the coolant freeze point and one tests the concentration of coolant additive (nitrite). After dipping the strip in coolant, you compare the color of the pads against charts to read the levels.

The nitrite level is important for heavy-duty diesel engines. The additive protects the cylinder liners from damage. There’s a very technical theory on how coolant can be knocked away from the liners by vibration, which creates an area of vacuum that the coolant rushes back into, colliding with the liner and eventually eroding the steel liner. The additive, which protects against this, slowly depletes. Heavy-duty diesel coolant should be tested periodically and if necessary, supplemental coolant additive (SCA) needs to be added to the coolant.

After testing our coolant, I see that we need a maintenance dose of SCA. Today I’ll see if I can find SCA at a car or truck dealership. I need to add one pint per 20 gallons of coolant.

I also changed the external fuel filter in preparation of our summer travels. I’ll get started on the trailer re-organization today. Every time we sit in one place for a while, we seem to accumulate more stuff. In the last month, I’ve added another bicycle and Donna added a new bin and two boxes containing steam cleaners – Reliable Brio and Reliable Pronto. You’ll be hearing more about the steam cleaners because Donna has been asked to create videos for Camping World’s online catalog. I’ll find a way to make it all fit in the trailer.

Last night, we grilled cheeseburgers for dinner and hung out, watching television. Today, I have a follow-up visit with the chiropractor. Later, we’ll pick up a car our friend, Lana Jansen, generously offered to us. This will allow me to drive Donna and her bicycle to the start of tomorrow’s bike race. I expect a busy weekend ahead as we prepare to start roaming again.