The combo valves basically just work by a pressure differential between the 2 sides of the rubber valve, causing the rubber over the inner holes to lift and allow oil to pass unfiltered through the base, between the 2 sets of holes.
What are the differences in these:
https://www.walmart.com/ip/Super-Tech-Extended-Life-Concentrate-AF-Coolant/654563748
and
https://www.walmart.com/ip/Super-Tech-Antifreeze-Coolant/16645420?fulfillmentIntent=Shipping&athbdg=L1600
Trying to decide which to keep in stock to replace dexcool for...
You can buy the soda pop syrup )coke, etc. From your local distributor. It comes in a 5 gallon box so you'd better like it. I have done it for nearly 30 years