I may be wrong but I think you want to mix it outside of the system, then add once mixed properly.

 

According to Gemini:

Based on information from various sources, the washer fluid bottle capacity in a 2022 BMW i4 is around 5 liters (or about 1.3 gallons).

However, some owners on forums have noted that when the low fluid warning light comes on, it only takes about one gallon to fill the reservoir back up.

 

According to Gemini:

...the answer is £4

I highly doubt 5 litres. I've filled it twice and used 2 litres and it seems to have lasted about as long as when I got the car from new.

It would be good if you tried 5 litres @smatanovic because you could tell us how much of it you actually get in and then the rest of us would know!

 

Has anyone ever actually run out of wiper fluid?

I don't think I have since I was like 19.

 

Has anyone ever actually run out of wiper fluid?

I don't think I have since I was like 19.

Areas with a lot of bugs + a lot of driving will do it. I usually got the RainX Bug Remover wiper fluid to help with that. The OEM fluid wasn't getting the job done.

 

The easiest method is to premix in a 5l container..

 

Don't overfill. Don't let it leak..... typically a $1k bmw repair bill.

 

That's nonsense. The window washer fluid is not damaging the car. We spray it on thcars every time. Overfill means waste. Nothing else. Not dangerous or harmful.

 

One great side effect of an electric car is the instant heat. In the dead of winter or during an ice storm I start the preconditioning before leaving wherever I am and by the time I walk to the car windows are clear and melted. It is nice to jump in the car while everyone else in the lot is scraping ice off their windows. Only problem in the cold zone is keeping the wiper fluid from freezing so it can clear the road grime off of the windscreen. -45C jugs fix that problem!

Downside is because there is very little heat under the hood the snow tends to accumulate between the aft end of the hood and the wiper arms.

 

One great side effect of an electric car is the instant heat. In the dead of winter or during an ice storm I start the preconditioning before leaving wherever I am and by the time I walk to the car windows are clear and melted. It is nice to jump in the car while everyone else in the lot is scraping ice off their windows. Only problem in the cold zone is keeping the wiper fluid from freezing so it can clear the road grime off of the windscreen. -45C jugs fix that problem!

Downside is because there is very little heat under the hood the snow tends to accumulate between the aft end of the hood and the wiper arms.

I wonder whether a spray-bottle filled with your superb anti-freeze could help clear that ridge of snow at the wipers.

 

the jugs in Canada are generally 1 gallon (3.8L) the i4 takes almost the whole thing when the warning goes off.....

 

It seems to hold quite a lot! I fill with 4 X 4 Cup Pyrex cups. That's 16 cups which is one gallon. Plus I add squirt in a bit of Dawn detergent liquid. I usually fill when warning light comes on so assume still some water in there. No mixing here in So Fla!

 

I just use an Arrowhead gallon water jug, saved in the garage and mix the BMW wiper fluid to the right ratio in there. A gallon fills it all the way full without spilling out, once the alert goes off. The BMW wiper fluid concentrate has measurement marks on the side of the bottle so it is easy to use exactly how much you need for your ratio.

 

So concensus seems to be about 4L / 1G once the warning comes on.

So next question is what additive, as i see a few different replies here (often depending on climate).

Is it worth getting the BMW stuff? I generally use Auto Glym concentrate, or whatever they sell at the garage in an emergency. Just wondering if I should stock up on the BMW stuff for winter (UK)?

 

Is it worth getting the BMW stuff? I generally use Auto Glym concentrate, or whatever they sell at the garage in an emergency. Just wondering if I should stock up on the BMW stuff for winter (UK)?

For me when I have used non-OEM I have ended up with some form of bacterial growth in the tank that then blocks the pumps or nozzles. Happened with my E53 (X5) and I’ve used BMW fluid ever since (20 years) and never had a problem. If the Auto-Glym product contains alcohol then you may well be fine. In Europe at least, BMW fluid contains Isopropyl Alcohol (IPA) and this may be the bacterial inhibitor.

I buy it in 5L containers from the dealer.

EDIT - Auto Glym Ultimate screen wash does indeed contain Propan-2-ol (aka IPA). It’s also available in 5L containers.

 

You don't need to know that to be able to mix it. I mean, the volume is changing and depends on how much fluid you have in the tank from the previous fill up, so even if you know the total volume you can fill it with, the information is irrelevant for you . Mix it before filling, and if you have some left you just keep it until next time. Don't mix it in the car's tank, that's a very poor idea.

 

You don't need to know that to be able to mix it. I mean, the volume is changing and depends on how much fluid you have in the tank from the previous fill up, so even if you know the total volume you can fill it with, the information is irrelevant for you . Mix it before filling, and if you have some left you just keep it until next time.

I mix it in a jug so it is useful to know the capacity as I wouldn't keep left overs.

Also the volume isn't changing for me, I fill up when the warning light comes on (as I suspect a lot of people do). I suppose if I was doing a very long road trip, travelling around Europe for instance, I might top up in preparation, but that is so rare that it doesn't factor into my normal practice.

 

5 liters is probably correct - I filled from a four liter container, and there was still capacity for a little bit more.

 

No one ever asked this question. Ever.
Just pour some in and more in winter to get the benefits of the antifreeze.

 

There are sources for Windshield Washer Fluid for temperatures down to around -34*F/-37*C. Ex: Splash, Prestone, etc. Less than an ambient temperature of 40*F/-40*C and you'll not get gasoline to vaporize at any ratio that can be ignited. So that has traditionally been the extreme value for the stuff they use in passenger cars.