back in August I flushed it it about 8 gallons of fluid, just poured it in real slow until it came out ruby red with no bubbles. Then I changed a gallon every 1000 miles for the next 3 gallons, the stuff is still ruby red with no bubbles.
right now the fluid looks new, on my fingers and on a rag. the quart I drained into a cottage cheese container has a slight darker tint, ie I cant see the bottom on a 6 inch container, it does not smell burnt.