Era Chas I think that Pat needs to recheck the bottles. Green coolant is good for 36 months or 50k miles. The orange coolant is good for 5 years or now 120,000 miles. A test strip will tell you if it is time. Also how hot and hard the motor is run. Me I run the green coolant 5 years and add the booster at 3 years. With new motor and bigger radiator have gone to orange coolant because of the added sealing of the mixture with so much silicone. Going on 4 years and still good for -30f. This is for storage and around the area with short hops. At the track I use water wetter and distilled water. Tracks can fine you and remove you from them if a large spill happens with
antifreeze. Rick L.