A clean windshield can decrease your wh/mi

[Matt L]

See my later post. Just Posted a 77 mile round trip with 95% highway (65 mph). 99% efficient with heat on 68F.

BTW in colder temps you probably use more heat driving slower. Because you’re heating longer.

If you can avoid recirculate off and avoid A/C on by keeping glass clean, then “summer” driving influences dominate (tires, Speed etc.).

BTW with a passenger and two dogs, flipping on A/C was a requirement and my efficiency went way down.

Yeah, didn’t see your second post but that’s much more normal efficiency.

 

[mswlogo]

Yeah, didn’t see your second post but that’s much more normal efficiency.

It is?

Do you have something constructive to contribute here from sunny California?

 

[Matt L]

It is?

Do you have something constructive to contribute here from sunny California?

Lol, sorry man. I’m glad your window is clean.

 

[txwoodchuck]

I'm no cosmetologist, but I think the temperature and humidity play a big part in window fog.

 

[strider]

I find that prediction really odd because the windshield in my wife's Model 3 has only been cleaned once since she took delivery in May and it looks beautiful, even in direct sun. My September delivery has been cleaned twice but only because the first time didn't totally get rid of the suction cup marks. Those two cleanings were not until I had the car about a month and I didn't notice any film building up on the glass. When you think about it, it shouldn't be any different from other cars since Tesla uses similar materials as other manufacturers.

We tend to leave the windows rolled up all the time and rely on the climate control to introduce fresh air and regulate temperature and humidity. I wonder if there is something different about your car or environment that's increasing the need for you to clean the glass?

When we got our first model S there were tons of people here on TMC having problems with hazy windshields. The consensus was off-gassing plastic. Our second one was a service loaner so was 4 months old when we got it - it has not been as bad.

Based on the earlier poster that M3 plastics are outsourced, yours may have sat around at the manufacturer or at the Tesla factory long enough to off gas prior to assembly into your car while others may have had "fresher" plastic. Also some M3's sit around for a while needing re-work or whatever giving the plastic more time to cure before the car is in your hands.

At the end of the day it's a temporary thing. Just enjoy the extra time you get to spend in your car

 

[mswlogo]

How dirty your windshield is on the inside varies a lot. Some of it might not be so visible either. If you’ve never cleaned it I can guarantee it’s filthy.

As much as I have cleaned it, I still see the suction cup marks when I’m cleaning it. So I know it could be cleaned even better.

There is no question in mind mind this has helped tremendously.

I did another test trip the other night. 66 mile round trip at 16-18F. I got 269 wh/mi. On the way out it was 18F. Stayed clear. On the way back it just started to fog up around 16F after 30 miles. No way I could get close to this before cleaning.

At 0F I had to turn on A/C (after blasting defroster to clear it). With several passengers at very cold temps I have to resort to fresh air (which is the real watt killer). I want to minimize fiddling with HVAC or know better ahead of time what I know will work.

 

[StealthP3D]

When we got our first model S there were tons of people here on TMC having problems with hazy windshields. The consensus was off-gassing plastic. Our second one was a service loaner so was 4 months old when we got it - it has not been as bad.

Based on the earlier poster that M3 plastics are outsourced, yours may have sat around at the manufacturer or at the Tesla factory long enough to off gas prior to assembly into your car while others may have had "fresher" plastic. Also some M3's sit around for a while needing re-work or whatever giving the plastic more time to cure before the car is in your hands.

Both of our Model 3's were fresh off the line when we took delivery (as confirmed by the production date). Both were cleaned by the delivery specialists before delivery, or at the factory, because they appeared clean in direct sunlight at delivery. But both had suction cup marks when the windows would fog. That was remedied on both Model 3's by a good cleaning about a month into ownership. I did apply the anti-fog treatment to both windshields to minimize climate control energy consumption and, many months later, the windshields are both still very clean in direct sunlight, resist fogging very well and I have not noticed the suction cup marks (or the square marks) since.

My experience with our two Model 3's is why I'm skeptical that they are substantially different than any other new car. I've already pointed out that most or all of the injection molded parts are made in Mexico, shattering the theory that Model 3's outgas more than other cars because the plastic is injection molded in Freemont. If anything, the highly raked windshield might be initally a little more susceptible to outgassing deposits because of its steep rake and proximity to the black dashboard surface. But, no, I don't think it's a defining difference, if anything it might get the outgassing over with more quickly.

 

[Glamisduner]

use a 50/50 distilled or RO water rubbing alcohol solution, then invisible glass using the 3 towel method Works like a charm!