Winter's coming....favored washer fluid for hard winter?
10-21-2018, 03:31 PM
#1
Burning Brakes
Thread Starter
Winter's coming....favored washer fluid for hard winter?
It'll be be my first northern winter with the CTT (but not for me). Washer fluid wasn't an issue before since the dealer fills always carried me through til the next service. I like to stay with Porsche reccy's but the cost of filling the 7.5L washer reservoir with OEM/imported washer fluid mixed for -20F is nuts so I'm looking for the most effective and Porsche-safe auto parts store alternative.
Last edited by DWPC; 10-21-2018 at 05:23 PM.
10-21-2018, 05:39 PM
#2
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The blue stuff for $1.99/gallon (more in filling stations) works just fine. No particular brand - it's all the same stuff (water, alcohol and blue coloring. Porsche does have a small bottle of additive you can put in it - that adds a bit of detergent to the mix.
10-22-2018, 11:03 AM
#4
Drifting
It is all pretty much the same. Here all of it is good to -40 and starts going on sale about now. Up here most use the same year round as it is a pain in the *** if summer bug juice freezes your system. Been there done that when I just saw windshield washer fluid and didn't read the label. That was in a 70's chev truck. LOL
10-22-2018, 03:52 PM
#5
I always just get the coldest rated stuff I can. -40 rated is the bare minimum.
Make sure to use the current stuff up as much as possible before filing up with the winter stuff. The Cayenne has a huge fluid capacity and can easily retain enough that when things get really cold, it will crack the lines and tank.
Weirdly enough my local BMW dealership is always selling it by the box (4 jugs) at about $2/jug. So I always stock up from there.
Make sure to use the current stuff up as much as possible before filing up with the winter stuff. The Cayenne has a huge fluid capacity and can easily retain enough that when things get really cold, it will crack the lines and tank.
Weirdly enough my local BMW dealership is always selling it by the box (4 jugs) at about $2/jug. So I always stock up from there.
10-22-2018, 05:39 PM
#6
Rennlist Member
Whatever you do, do not use the RainX stuff. May not happen in Porsche, but in two of my Audi's, it leaves a coating on the sensor, which makes it read that the tank is empty when it is full. It's only a $3 part to replace, but I had to remove the bumpers to do it.
10-22-2018, 05:45 PM
#7
I second that. The rainx stuff is more expensive and a few manufacturers even warn against it. Also doesn't seem to work.
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10-22-2018, 11:46 PM
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10-23-2018, 09:05 AM
#11
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The -20 stuff just not cut it in the midwest. I always use the -30 or -35 stuff they sell at the gas stations in Wisconsin and Minnesota. Works great. They know winter.
10-23-2018, 11:14 AM
#12
Nordschleife Master
Something to remember is that the 'low temp' protection is usually alcohol.
If you don't use it up, the alcohol can evaporate over time. The system is mostly closed, but it is vented. Temp fluctuations can and will push air in & out.
With the alcohol evaporated, the temp rating is not as low as it could/should be.
If you don't use it up, the alcohol can evaporate over time. The system is mostly closed, but it is vented. Temp fluctuations can and will push air in & out.
With the alcohol evaporated, the temp rating is not as low as it could/should be.
10-23-2018, 01:37 PM
#13
Burning Brakes
Thread Starter
10-23-2018, 05:16 PM
#14