Here is an extended life red coolant that’s not the pink RV winterizing pipe stuff.
Zerex Extended Life Red Heavy Duty (HD) 50/50 Prediluted Ready-to-Use Antifreeze/Coolant 1 GA Amazon product ASIN B0011E91K4View: https://www.amazon.com/dp/B0011E91K4/ref=cm_sw_r_cp_api_glt_fabc_97MKFYV13CW5FG6FMNXD?_encoding=UTF8&psc=1
Zerex Extended Life Red Heavy Duty (HD) 50/50 Prediluted Ready-to-Use Antifreeze/Coolant 1 GA Amazon product ASIN B0011E91K4View: https://www.amazon.com/dp/B0011E91K4/ref=cm_sw_r_cp_api_glt_fabc_97MKFYV13CW5FG6FMNXD?_encoding=UTF8&psc=1