In late 2008/ early 2009 Subaru switched over to a very long life coolant, good for 11 years/137,500 miles on the factory fill, and 6 years/75,000 miles on the second fill. They call it "Long Life Super Coolant". Their conventional green coolant (with sodium benzoate and phosphate) is "Long Life Coolant" and good for 30 months/30,000 miles.
The ingredients listed on the jug of Super Coolant are:
water
ethylene glycol
diethylene glycol
KOH
Proprietary Inhibitors.
Anyone have an educated guess about what the proprietary inhibitors are? I am wondering if this coolant is similar (or identical) to Mazda's FL22, and sourced from the same company, CCI.
The ingredients listed on the jug of Super Coolant are:
water
ethylene glycol
diethylene glycol
KOH
Proprietary Inhibitors.
Anyone have an educated guess about what the proprietary inhibitors are? I am wondering if this coolant is similar (or identical) to Mazda's FL22, and sourced from the same company, CCI.