Nearly all coolant is ethylene glycol. The color of the coolant doesn't change that.
If you want the best coolant made then use the patented Glysantin formula sold at the European car dealerships. You can use the blue Glysantin G-48 that is sold at BMW or formerly sold at VW/Audi as G-11. It works well.
You can use the new Glysantin G-30 that is sold through VW/Audi now as G-12 (this has been changed to a purple formula making it compatible with the old blue G-11).
Or you can use the older style Glysantin G-05 which is sold through Mercedes-Benz, Chrysler, and Ford dealers and also at some autoparts stores as Zerex G-05.
If you can read German then visit www.glysantin.de
and get the full scoop. If you don't read German then I'll type a bit of pertinent info:
Glysantin G-48 is blue in color. It is factory fill for BMW (p/n 82 14 1 467 704) cars, motorcycles, and mini cars. It is formerly factory fill in VW/Audi (p/n ZVW 237 105) cars through MY 1996. It meets industry norm N600 69.0 and VW's TL 744C. It is ethylene glycol based, low silicate, low pH, phosphate free
, <250 ppm silicon and has very high levels of corrosion inhibitors. Service life is 4 years.
Glysantin G-30 is red in color. It is factory fill in VW/Audi products. It meets VW's TL 744D. It is a ethylene glycol based, silicate free, borate free, nitrate free, amine free, nitrite free, phosphate free
, <10 ppm of silicon, very high levels of corrosion inhibitors, carboxylate formulation, OAT (organic acid technology). Service life is 5 years.
And finally there is G-05. It meets a whole boat load of standards. It was formerly used in Europe in heavy duty diesel trucks. It is long life, ethylene glycol based, lower silicate, low pH, phosphate free
, <310 ppm silicon.
I've read the actual laboratory tests for these anti-freezes and to be quite honest the blue G-11/G-48 seems to perform best at keeping things clean. It does require a more frequent replacement. My TDI says that the coolant is lifetime but you have to change it when you change a water pump so the coolant life is only as long as the components that it is working with. My lifetime coolant was replaced at 4 years when my water pump seized.
So, if you have a older vehicle that hasn't had the most meticulous maintenance and you want to save a buck then buy G-05 from the autoparts store for $9 a gallon. Use distilled water.
If you want the next in line then buy blue G-48 from BMW for $12. Use distilled water.
If cost is not object then buy the newest purple G-30/G-12 from VW/Audi for $17 a gallon. Use distilled water.
Ohh, did i mention that it's best to use distilled water? [img]/images/graemlins/smile.gif[/img]
Caveat: all Glysantin patented products sold through new car dealerships in North America are manufactured by Ashland chemical(ZEREX) under license and authority from BASF/Austria.
One last thing.. Valvolines Max-Life coolant in the red container is a impressive coolant. It has very similar formulations to the Glysantin products and would be my recommendation in your transplant project.