Other than Porsche Black label ( a G40 ?)

I see:
Pentosins
SF was G12, no silicates (only 1.5 liters?)
E aka G13 with silicates

VW/Audi
G13 with silicates

Zerex
G40

Does anyone see a problem with moving to Silicated 40/13, and a non Porsche variant?

Coolant capacity for 2006S?

Folks that actually make the base of the stuff:
http://www.glysantin.de/en/application.html

Pentosin:
http://www.pentosin.net/f_antifreeze.asp

 

Stick with OEM.

It works exactly as designed.

 

I run SF, it is pink like the OEM stuff. That being said, E is G12 compatible but SF is easier find so its up to you.

VW/Audi stuff is the same thing. When I had my Audi, there was a large debate over coolant. One of the members tested out different coolant mixtures with electrodes and found that Pentosin was equivalent to oem. Mixing with other coolants like prestone or dexron resulted in decreased corrosion protection.

 

I just buy the pink OEM Porsche stuff and create bottles with a 50/50 mix using Distilled Water. It's not that much more and I have other things I'd rather worry about than damaging seals or allowing for corrosion in my cooling systems, but obviously it's your choice.

 

With as many PCars as there are on the road, it makes NO sense that the answer for us who get the mysterious "Coolant problem, see repair shop" is go to the shop. Looking at the level in my 991, it IS below min, so I'd like a simple solution to mitigate the issue without risking a chemical imbalance by adding water only, so maybe having a store bought available solution as a temporary fix should be within reach and not require an hour or more reading argument threads that result in "just use the Porsche stuff". If the Porsche stuff was in the store and cost more than the "lesser" stuff, I'd still buy it, and I'd also keep an eye out and return to the dealer if I thought it necessary, but I can say for sure, that taking my car to a dealer to have them top it off, or go to the dealer parts to get coolant and they are closed are two CRAPPY options.

 

You could always plan ahead a little to control your own destiny and keep a small stock of the specific lubricants and fluids your car needs in the garage. My mixed Porsche coolant jug got to below half the other day topping up the Cayenne, so I just bought another one, will create 2 bottles of 50/50 mix and put them in the parts cabinet and be good for the next couple years of until I need more than that for a planned job, like a water pump replacement.

I also have a can of Pentosin in the cabinet for the power steering and PDCC system, and dome Motul RBF600 for the brake fluid that's in all my cars.

Do you keep spare bottles of oil of what's in your car or go to the auto parts store whenever you need some? If so, why not the other stuff? A little planning can go a long way to make life easier.

 

You sir are correct! I do respect planning ahead, I take responsibility for that. I think Porsche can take the rap for availability, as I CAN go to autozone or even walmart and find a suitable motor oil to replenish the stock with, so now that's a two stop trip, one of which will be out of the way for sure, and be at a time that is not one I'd choose.

 

Yes - but do Walmart or Autozone offer free coffee? On the Pensotin it can be found at any NAPA auto-parts store. The real stuff, same as what Porsche will sell you.

Coolant - I'll mail order it when I see I'm getting low, and when driving from Coast to Coast, I always carry a gallon diluted 50/50 in the vehicle (this assures I'll never need it..) I've heard horror stories about sludge/gel forming by mixing incompatible coolants - so I'll stick with the stock stuff. The complexity of the Cayenne cooling system is such that I know some residual old coolant will remain no matter how carefully I try to flush it out or drain it. Adding complexity to my life to save a few bucks isn't something I do anymore. In reality - cooling systems should not consume any coolant - so there should be no need to carry any around - but we know how that goes.

 

First, I agree that the specs are unnecessarily unclear. I actually looked up those links in the original post, downloaded the PDFs, and the Pentosin has different products for my 2003-2005 4.5L V8 (spec is SF-G12+), and a different one for the 2006 (spec is E-G13). The Glysantin lists a single product (G30) for all Porsche from 1996-2010. I know that could all be true, but it's the sort of thing to make a rational person stop reading.

So I'll probably just stick to the Porsche branded stuff, even though I'd be happier to find something else I can trust.

But for your situation, I would not hesitate to just add water to bring it up to level. If this is a one-time top-up (vs. an on-going leak), the change in concentration should not be a factor. These coolants typically allow variation in mix level from about 33% to 60%, to give you varying levels of freeze protection. There is nothing magic about 50% in this case, so if the added coolant drops you to 48%, you're still well within the typical range of concentrations.

 

First off, the small amount of water (compared to the total system volume) wouldn't change the 'chemical balance' enough to matter much.

Put in enough water to bring it up, pay attention to how much it was, and then next time, pour in that much pure coolant.

Also, "Porsche branded" coolant is available from the 'usual suspects'. When I did my pipes, I wasn't planning on flushing and replacing all of the coolant. Seeing as it was dealer serviced it's entire life by the PO, I knew it was branded coolant in there. So I got a gallon in the pipe kit. I used maybe a quart and a half of it topping off the coolant after I was done.

For the other cars (928 & 944), I've done complete flushes. I didn't have to worry about weird results from mixing very different coolants, so I went with a 'global' coolant, that is approved for aluminum blocks & radiators. It has worked well so far.