seb928s

Ok I ordered a gallon of coolant from Porsche it's like pinkish in color. The coolant I have in my 99 911 is like clearish with green tint. I know mixing coolants is bad. It's an 1999 911 and as far as I know the coolant hasn't be flushed out that I know off. I'm changing the coolant bottle right so I need to get some information on this. Did Porsche use the same type of coolant? and changed colors later on?

seb928s

Bump. Anyone know what color the coolant was?

Tippy

Pink

AudiOn19s

As long as they're both Porsche Coolant it's fine to mix. They changed the color of their coolant at some point.

Macster

G-30-91 EF is pink. Just poured a tablespoon out in old plastic cup. Adding a bit of water and still pink.

However, stuff in car's coolant tank is green.

But I agree with AudiOn19s. If both Porsche antifreeze ok to mix.

Sincerely

Macster.

gota911

As was mentioned, Porsche chaged the color of the antifreeze 2 to 3 years ago. It was green, now pink.

redridge

If its from Porsche... its OK to mix colors.

Tippy

My car was a 2000 and it was pink. Never knew there was a green.

Halvin

i HAVE CHANGED TANKS AND CAPS AND USED GREEN MERCEDES COOLANT AND ALLLLL SEEMS WELL. i DONT THINK THE ENGINE WILL RUST THRU, DO YOU? oH THIS IS A 99/996 WITH 60K> i AM SO LUCKY TO HAVE THIS DREAM CAR!!!

maci911

i have used coolant from autozone ............the one that says compatible with all cars...............works fine.................

Macster

Not a question of engine rusting through, obviously.

There are several issues. Mixing incompatible anti-freezes could result in car's cooling system efficiency being compromised. Corrosion resistence could be compromised too.

While block will not hole there are other metal components present in the cooling system -- radiators, oil/water heat exchanger, cabin heater heat exchanger, that are made of much much thinner metal and a hole in say the oil/water heat exchanger is a serious problem.

And this corrosion means that the coolant gains an ever larger load of particulate matter from the inner surfaces of the cooling system shedding this as these surfaces corrode. This particulate matter could result in the water pump's premature failure.

Coolant is a *vital* engine fluid. The proper anti-freeze wants to be used and mixed with distilled water (as per factory manual guidelines) and the system kept full and free of contamination by even different type of anti-freeze.

Given the few dollars spent on anti-freeze over the life of the car I can't see any reason not to use Porsche anti-freeze and by doing so take the worry out of at least one area of owning the car.

Doing anything less is just not good for the car.

Sincerely,

Macster.