I just scoured the Prestone site. No where does it say silicate free. However, Peak 50/50 long life says it's silicate free.
Since I replace the anti freeze every two years, I have no problem buying mine from the dealer. $15 to $20 isn't going to break the bank.
2012 Pearl White GL1800
AMA Life Member
Last edited by cihilb; 02-11-2017 at 08:52 PM.