Vancouver996

I bought Evans waterless coolant http://www.evanscoolant.com , I ordered a low temp thermostat and a new water pump . I've used Evans in other cars , works great in internal corrosion prone 1990s VW wasserboxer engines and it's recommended by a lot of Porsche specialists , they use it in the csr cars too https://rpmtechnik.co.uk/csr-conversions/

MoeMonney

Can you tell that it keeps your engine cooler?

Vancouver996

No , but then I don't live in Phoenix .

I went with it because it's supposed to reduce hot spots and have a more uniform cooling , this should reduce the risk of bore scoring .

dgjks6

I use prestone universal on all my cars. Just add for top ups. Actually talked with prestone and the said it is fine. Did the oat/host research and it makes sense. Use on my BMW with 185,000 miles, Audi with 1750,000 miles, excursion with 230,000 miles, and Grand Prix with 155,000 miles and never a problem. Will use in my 997 when/if needed.

808Bill

? Audi with 1750,000 ?

dgjks6

175,000. Got carried away with 0's

centexsi

I've successfully used the violet Rowe AN 13 coolant - its basically G13 and backwards compatible and works great in Porsches. A lot of people in Europe use it. Whatever you use, make sure you dilute it only with distilled water!

https://www.vividracing.com/catalog/...151410679.html

Tremelune

The color of coolant is no longer relevant, and was always just a dye added. Antifreeze is clear, naturally. Most types come in all colors these days, due to some bad decisions by manufacturers around the turn of the century.

What is the chemical makeup of the Audi/VW G13, G40, and Porsche coolant?

The Evans stuff seems to require a full drain of the system, as well as drying it out and replacing the radiator cap? I'm still not sure I believe that the higher boiling point is actually reducing hot spots due to localized boiling of normal coolant. It's not like major car manufacturers have never heard of the stuff. Wouldn't they love a lifetime coolant fill?

Interesting history of the various coolant types:

https://www.hemmings.com/blog/2014/0...of-antifreeze/

Weird website with seemingly valuable information that essentially claims that Amsoil coolant is POAT and compatible with everything:

http://www.engine-performance-online...ifreeze-types/

For how many years/miles did they have the Prestone in them?

bw1999

Stupid question maybe, but how often are you supposed to flush the coolant. I thought it was "lifetime" coolant, meaning you never had to flush it.

Tremelune

"Lifetime" means "we're not gonna eat the cost under warranty". Newer long-life HOAT and POAT coolants seem to claim 5+ years.

The equation changes for people who drive their cars for 2 years, 5 years, or decades.

dgjks6

Swapped the Audi at 100,000
BMW at 75-100k when I did the water pump the first time - failed again at 150,000
Excursion at 100,000