I read in one forum post that Peak 10x contains phosphates, but I've seen that nowhere else, and it's not in the spec sheet provided by OWI.
I'm just wondering, because I used Peak 10x to refill my 2006 Mazda3, after replacing a cracked overflow reservoir and flushing the system. As far as I understand, 2006 was before Mazda started requiring FL22 in the 3. There was no FL22 marker on my reservoir cap or anywhere else related to the cooling system (so according to my owners manual, FL22 is not required for my car). The coolant that I flushed out was actually blue, so I don't know what that was (I guess some mechanic put it in there) since the Mazda coolant is supposedly green. But, back to the point, I read that phosphates are in the OEM equivalant coolants for Mazdas, because they help with longer life. So I'm just wondering if Peak 10x is similar to FL22 in that respect (given that it claims to be okay for Japanese vehicles).
I'm just wondering, because I used Peak 10x to refill my 2006 Mazda3, after replacing a cracked overflow reservoir and flushing the system. As far as I understand, 2006 was before Mazda started requiring FL22 in the 3. There was no FL22 marker on my reservoir cap or anywhere else related to the cooling system (so according to my owners manual, FL22 is not required for my car). The coolant that I flushed out was actually blue, so I don't know what that was (I guess some mechanic put it in there) since the Mazda coolant is supposedly green. But, back to the point, I read that phosphates are in the OEM equivalant coolants for Mazdas, because they help with longer life. So I'm just wondering if Peak 10x is similar to FL22 in that respect (given that it claims to be okay for Japanese vehicles).