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Fill with a good washer fluid
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Be sure the wipers are in good shape and the windshield washer tank is filled with a good washer fluid that won't freeze or stain the body paint work.
Leading evidence: 'Fill with a good washer fluid' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check tire pressures' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
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Suggestion
If winter cold temps get too low run 0w-40 for its better cold flow.
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Suggestion
Been running our C4 for 15 years year round from 105 degrees to 0ish degrees.
Use 0w-40 if the temperatures were something below freezing
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Suggestion
Personally I'd err on the side of caution and consider using 0w-40 if the temperatures were something below freezing.
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Suggestion
Important: Every time you rinse or wash the car be sure to drive the car afterwards and use the brakes enough to thoroughly dry the hardware or the rotors can rust up something fierce.
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Suggestion
On days above freezing I'd take my Boxster to a DIY car wash and use the rinse setting to rinse the car off remove any build up of snow/ice on the car under the wheel wells in the radiator ducts.
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Turn key on. Select appropriate gear. Press the long thin pedal.
Seriously, just drive it and enjoy it. Been running our C4 for 15 years year round from 105 degrees to 0ish degrees. We do nothing to the car between seasons.
Unless you are in Florida or someplace that sees no snow and winter temps are mild as others have advised snow tires, real snow tires are a must.
Sure one might manage to get by with summer tires -- I have -- but your luck will run out and you'll wish you had the right tires as you await the tow truck.
If winter cold temps get too low run 0w-40 for its better cold flow. Porsche guidelines call for 0w-40 if temperatures are -25C or colder. Personally I'd err on the side of caution and consider using 0w-40 if the temperatures were something below freezing.
Be sure the oil is fresh. It will get loaded up with contaminants over the winter but it should start out fresh.
Be sure the battery is in good condition. Cold weather is hard on batteries.
Be sure the coolant has sufficient resistance to freezing.
Be sure the radiator ducts are free of any trash build up.
Be sure the body water drains are free of any trash.
Be sure the wipers are in good shape and the windshield washer tank is filled with a good washer fluid that won't freeze or stain the body paint work. Where I used to live/drive gas stations/truck stops would store this stuff in gallon jugs outside on pallets. I'd buy a gallon or two on a real cold day selecting jugs with no ice in them to get the stuff that would resist freezing the best.
Check tire pressures.
The car will get "dirty". On days above freezing I'd take my Boxster to a DIY car wash and use the rinse setting to rinse the car off remove any build up of snow/ice on the car under the wheel wells in the radiator ducts.
I'd rinse the underside too.
Come nicer weather give the car a thorough washing and rinse. I'd use the garden hose at the house to really "flood" the car to wash/rinse away all traces of any salt.
I'd rinse the underside, the condensers and radiators, the wheel wells, tires/wheels and brakes and suspension. Everything. The plain water flushes away any salt and sand/grit.
Important: Every time you rinse or wash the car be sure to drive the car afterwards and use the brakes enough to thoroughly dry the hardware or the rotors can rust up something fierce.
Last but not least slow down and remember even with snow tires traction is going to be less than you are probably used to. When I lived/drove in winter weather I was amazed at how fast most people drove even in nasty weather.
During one snow storm I was driving -- on 291 east of KC MO -- counter commute and the oncoming lanes of traffic were nearly bumper to bumper with cars traveling at over the limit. In the space of just a few minutes I saw several cars lose control and leave the pavement and go off the side of the road or come in to the median in a billowing cloud of snow.
Another time on a freeway -- I-70 a few miles west of Booneville MO -- with just light blowing snow vehicles were zooming by me like I was standing still. Some minutes later on the way back the way I had come in the space of just miles I stopped counting the number of vehicles off the road after I got to 6. While the snow wasn't that bad the blowing snow made the road surface quite slick.
Ideally, IMO, coming from here in MN with a lot of salt crap on the roads, I'd have two 911's.
One would be my nice summer car, and the other some high mile C4 beater with the 4 wheel drive part working. Engine can be scored, body can be scratched, and interior doesn't have to be great. Then I'd have no issues putting on some snow tires and beating the snot out of it until spring.
Can't think of anything more important than good winter tires, a long handled window ice scraper, extra washer fluid in the frunk and some good gloves. If it's really cold (anything like the Canadian prairies)a sleeping bag and winter emergency kit are also a good idea.
I live in Texas so don't know about winter tires. I thought they were only for bad weather (like snow or sleet). Obviously from this thread they operate better on cold pavement? Enlighten me.
All-season and winter tires use a different rubber compound than summer tires. Summer tires will just not have good grip if temperatures are at or below freezing. I leave my summer tires on year round but some winter days my 996 stays at home.
The rubber compounds used in summer tires become less pliable below 40 degrees Farenheit, and the performance suffers accordingly. Winter rubber compounds remain pliable below freezing and the tread patterns are different than summer tires to help evacuate snow and slush.
I'll make the switch to winter rubber in the next two weeks.
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