Ethylene glycol vs. Propylene gycol coolant

[tjsea]

Which coolant is better? I have been looking at Fleetgaurd's ES compleat line. I don't really want to use the Fleetcool becuase I would rather have the DCA-4 over the DCA-2(just my personal preferance since the Ford stuff is the same as the DCA-4). I know that the PG is less toxic than the EG is to pets and whatnot, but will the PG attack gaskets or o-rings or is it ok.

 

[itsacrazyasian]

Neither should hurt gaskets. Its the OAT coolants that wreck havoc with the older cooling systems. Propylene glycol is more efficient at heat transfer, Ethlyene has a lower viscosity for improved flow and is better for freeze protection.

I've never used the ES compleat so i can't comment about any ill effects on my motor. I've been using fleetcharge.

 

[tjsea]

Cool, that is what I was looking for. Thanks.