I see three on the market:
- Oxalic acid with a seperate neutralizer (Prestone Heavy Duty)
- Sodium Citrate (Prestone Super Radiator Cleaner)
- TSP based (Prestone Fast Flush)
I have a tractor that had the factory coolant in for 9 years. Although there are no problems, I'd like to chemically clean the system vs. doing a flush.
Which of these works best??