Green vs. Gold (yet another thread)

[filp]

Mine is green, because I added fluorescent dye into Zerex G05 Just being paranoid about leaks etc

[BillGrissom]

No expert, and I have no dog in the fight since I have Evans Waterless Coolant in my two 300's, but still interested. You can find many discussions. I post one below which seems researched. G05 is HOAT which Chrysler and M-B used until 2012. Chrysler then switched to OAT, which is claimed identical to GM Dexcool. I don't know if M-B did the same (divorced by then?).
https://www.wranglerforum.com/threads/mopar-oat-dexcool-believe-it-or-not.238028/

I made the mistake of putting Dexcool in my 1996 Plymouth Voyager maybe 5 years ago, tempted by the "10 year lifetime" claim on the jug. It had normal green coolant before. I recall flushing it well with citric acid and water first, but unsure. Still, hard to get all the coolant out of the block and heat core, even if you unscrew the block drain(s). For the last few years, I have been getting small brown squishy floaters at the top of the radiator, coating the cap. It isn't oily like one gets from a head gasket leak, more feeling like degraded cork. It might be the stuff people fuss about if you "cross the the streams". The engine even started running hot last summer, which I fixed by a citric acid flush and back to green coolant. Could be something else like degrading hoses, though the radiator hoses are fairly new and all heater hoses are now silicone. The only vehicle I'm not running Evans in, and keeping it green to use up my coolant stock.

[cmac2012]

Originally Posted by jhermit

Yes, I was surprised blue has not come up and that is what mine has. It is a Si-HOAT formula which I thought was compatible with these engines.

I used the blue coolant in both of my E30s, may they rest in peace.

[JHZR2]

I have a 350SD awaiting a head gasket.

I’ve done a lot of research, since this is a mixed metal engine. I’m comfortable with G-05, but I prefer John Deere Cool Gard II in the aluminum/iron engine. That’s what I’ll be running.

I’ve also shifted my two Cummins trucks to it and it has worked great and stayed clear and clean.

You can get it shipped free. It is not that high of a cost to buy.

[JHZR2]

Originally Posted by cmac2012

I used the blue coolant in both of my E30s, may they rest in peace.

Yeah, G-48 has been BMW OE forever. It also has 2-EHA which is a plasticizer.

I don’t think you can get G-05 in an OE Daimler container anymore. Apparently they push G-48 for these old engines. No thanks. G-05 or JD per my post above.