How and why you should Winterize Your Porsche Boxster

If you live in an inclement weather area, winter storage of a Porsche Boxster is a major part of your yearly maintenance schedule. You need to learn the correct methods to Winterize Your Porsche Boxster.

Why Winterize Your Porsche Boxster?

Safeguard Your Boxster from Corrosive Road Salt

It is not recommended to drive your Boxster in the snow. You should keep your car as far away from the dreaded white stuff as possible, and by the dreaded white stuff, I mean SALT!

Ensure Easy Continuity to the Next Driving Season

You need to be able to store the vehicle without big expense, and maintain a minimum level of deterioration to ensure an easy return to operation.

Protect your Investment

Storing your Boxster correctly will protect your investment for the life of your Boxster. These recommendations will protect your car from early mechanical issues and ensure the longevity of your investment.

How to Winterize Your Porsche Boxster

Here are some of the reasons for how you should winterize your Porsche.

1) Prepare Your Garage

Winterize Your Boxster Storage Garage
Choose your Garage storage location wisely.

Thoroughly clean the location of where you will be storing your Porsche. Make sure the area is dust-free. If moisture is an issue coming up from the floor, place a layer of poly sheeting or tarp on the floor. This will prevent rust from forming on the undercarriage.

2) Thoroughly Clean Your Wheels & Rims

Clean your tires and rims thoroughly inside and out. Make sure the rims are free of ALL brake dust. 

Once you have thoroughly cleaned your rims, apply quality Wheel Wax!

3) Wash Your Porsche Inside & Out

Boxster Washed and Detailed and ready to be Winterized.
Boxster Washed, Detailed and ready to be stored.

Have your car professionally detailed inside and out with plenty of coats of Wax, Sealer or Ceramic Quartz Paint Protection (bonus points). This will prevent corrosion of the paint on your Porsche.

This may also be an excellent time to prep and condition the canvas roof.

4) Make sure to clean and condition all your car’s interior leather.

This is the best time to do a thorough job to ensure that your leather remain supple all year round!

5) Condition all Rubber and Plastic Items

Make sure to use a conditioning compound on all exposed rubber and plastic items on the exterior of your Porsche. This will ensure that they do not crumble or crack with the humidity and temperature changes.

Porsche enthusiasts swear by the German made Gummi Pflege!


For rubber seals in car doors, windows, and boots, Gummi Pflege offers
long-lasting freezing protection. It also offers true, deep-down safety
conditions, helping to extend the life of rubber seals, gaskets, and
trims, offering protection from the sun’s cold, heat, and UV radiation.

If rubber seals around windows and doors go untreated they will deteriorate over time. As a result of changing temperatures and high UV sunlight exposure, the rubber starts to dry out, crack or shrink. When this happens the integrity of the seal will fail and lead to further problems such as squeaks, whistles, draughts, and leaks. The original luster is lost and the rubber continues to perish.

Unlike many plastic and rubber treatments, Gummi Pflege doesn’t simply buff rubber to look new. Gummi Pflege provides real, deep down protection, helping to prolong the life of rubber seals, gaskets, and trims, providing protection against cold, heat, and UV radiation from the sun.

6) Change Your Engine Oil and Filter before you Winterize Your Porsche Boxster

Winterize your Boxster buy changing the Oil
Change your Oil before you Store!

Porsche Service advisers recommend changing your oil and filter before your store your vehicle for the Winter. This will ensure that your Porsche is stored with clean oil. The clean oil will reduce the risk of harmful contaminants working away at your engine during hibernation — and you’ll be ready to go in spring.

Porsche recommends Mobil 1 0W40 Synthetic Motor Oil

7) Top Off All Fluids

Make sure all of your fluids are topped off, especially antifreeze, windshield washer fluid and brake fluid.

8) Ensure minimum Coolant Protection Coverage

Make sure your Porsche coolant is at a minimum of % strength to give you coverage down to minus 30°C to prevent damage to your radiators, engine block, cylinder head, and water pump.

This is CRITICAL is using an unheated location for the storage of your Boxster!

9) Set Tire Pressure

The most common problem encountered when winterizing and storing a car is that flat spots occur on the tires. Tires go flat on one side for carrying the weight of the car for an extended period.

To avoid flattened tires, overinflate all tires by approximately 8-10 psi. 
Overinflate the tires when the tires are cold, therefore you won’t get an inaccurate reading. Don’t worry about using jack stands or lifting the car.

10) Gas

Ensure your gas tank is full of premium fuel to prevent condensation and reduce tank airspace. 

11) Place Carpet Tiles Under Tires

Various Porsche owners use carpet pieces under tires in addition to adding more psi. This will further removes the risk of flat edges on your tires. Use two 2×2 carpet pieces (double layer). 

 I also use EZ-Flex Interlocking Recycled Rubber Floor Tiles for this purpose.

12) Use a Fuel Additive or Stabilizer

Make sure to add a fuel stabiliser to your tank when preparing for winter car storage, because this will protect the gas tank and gas lines. For over 4 months of storage, you need to consider adding a fuel stabiliser such as STA-BIL. Make sure you let the car run for five minutes to allow the stabiliser to flow through the fuel system.

13) Rodent Proof Your Boxster During Storage

Rodents love to find their way into your car and make it their cozy home when you winterize your Porsche Boxster. As a result, this can wreak havoc on your car if the rodents chew any wires. As a precaution, place a ball of steel wool in the exhaust pipe opening to prevent rodents from making a nest in your Porsche’s exhaust. Seal the air inlet, and place laundry fabric sheets inside the cabin and trunk.

Place bars of Irish Spring soap, mothballs, or mint leaves around the vehicle to repel mice and squirrels. Make sure to also close all air vents to keep critters out.

14) Keep it Dry

I save up any/all desiccant silica gel packs over the year (about 5 or 6) and place them in the vehicle so moisture will not build up.

15) Do Not Engage the Parking Brake When you Winterize Your Porsche Boxster

When you Winterize Your Porsche Boxster, a common mistake is to engage your Parking brake. Put the car in gear and release your parking brake. Make sure to place wooden blocks or wheel chalks under the front and back of a tire to keep your Porsche in place.

16) Install a Battery Maintainer

A major concern when winterizing or storing a car for 6 months or so is the draining of the car battery. The car battery will eventually die due to parasitic draining.

Connect the battery to a battery maintainer (not a trickle charger) to charge your battery via your cigarette lighter, select the pulse maintaining mode which is made to charge the battery while storing your vehicle. It is recommended to use the CTEK 3300 at a minimum. Also, be sure to purchase the CTEK cigarette plug adaptor and to use the cigarette plug in the passenger side wheel well (not the cigarette plug in the center console.)

17) Wiper Blades

Prop your wiper arms off your windshield using blocks of wood or cardboard. This ensures that your wiper blades do not remain in contact with your windshield during storage. This keeps your wiper blade edges in top form.

18) Windows

Lower your car windows very slightly (approximately 10mm or .5″.) This removes all pressure on the window seals. This will also promote air flow and reduces condensation. Only consider this if using a clean dry indoor storage location.

19) Cover

Protect your Boxster by covering it up. Use a good quality car cover to keep your paint finish safe from dirt and dust. An indoor cover for inside storage and an outdoor cover for outside storage. A high-quality tight fitting cover that will allow the car to breathe is a must.

20) Insurance while you Winterize Your Porsche Boxster

Those of us with newer vehicles may want to cancel the liability and collision portion of their insurance to save during the off-season. However, always maintain comprehensive (fire, theft and acts of god). Most classic car policies do not allow the option to temporarily suspend part of the coverage.

21) Do Not Start your Car, Wait until Spring

As tempting as it may be, do not start the vehicle until it is ready to come out of storage. 

A lot of people think starting a car every few weeks during winter storage is a good idea. But, unless you intend on taking the car for a good drive, simply letting it idle is actually detrimental to your car, because condensation will build through the various systems and not properly burn-off. Don’t be tempted to take it for a drive on a “nice winter day.” After all, you don’t want to go through the entire process again. The best policy is to let sleeping bears lay to rest. Absence makes the heart grow fonder and you will appreciate your beloved ride more when you finally get to bring it out of storage in the spring.

Originally Published December 19, 2018 1:32 pm

Other Articles of Interest

Car Storage FAQ

How do I prepare my car for winter storage?

1) Prepare Your Garage
2) Thoroughly Clean Your Wheels & Rims
3) Wash Your Porsche Inside & Out
4) Make sure to clean and condition all your car’s interior leather.
5) Condition all Rubber and Plastic Items
6) Change Your Engine Oil and Filter before you Winterize Your Porsche Boxster
7) Top Off All Fluids
8) Ensure minimum Coolant Protection Coverage
9) Set Tire Pressure
10) Gas (full tank)
11) Place Carpet Tiles Under Tires
12) Use a Fuel Additive or Stabilizer
13) Rodent Proof Your Boxster During Storage
14) Keep it Dry
15) Do Not Engage the Parking Brake When you Winterize Your Porsche Boxster
16) Install a Battery Maintainer
17) Wiper Blades
18) Windows
19) Cover
20) Insurance while you Winterize Your Porsche Boxster
21) Do Not Start your Car, Wait until Spring

Is Porsche Boxster good in snow?

The Porsche Boxster weighs under 3000 lbs ( <1370 kg). Even with full sport snow tires on, the Boxster will have issues with traction. Your primary concern should be the road salt that is associated with snow covered roads, as this can do serious damage to your Boxster.

Can you drive a Porsche Boxster in the winter?

Even with full sport snow tires on, the Boxster will have issues with traction. The Porsche Boxster weighs under 3000 lbs ( <1370 kg). Your primary concern should be the road salt that is associated with snow covered roads, as this can do serious damage to your Boxster.

Why should you Winterize your Porsche Boxster?

It is not recommended to drive your Boxster in the snow. You should keep your car as far away from the dreaded white stuff as possible, and by the dreaded white stuff, I mean SALT!

Should I start my Boxster with in Storage?

A lot of people think starting a car every few weeks during winter storage is a good idea. But, unless you intend on taking the car for a good drive, simply letting it idle is actually detrimental to your car, because condensation will build through the various systems and not properly burn-off. Don’t be tempted to take it for a drive on a “nice winter day.”

2 thoughts on “How and why you should Winterize Your Porsche Boxster

  1. I think this is a very comprehensive list of “Things to do” before storing your Porsche. A couple of the things I had not thought of. Good reminders on all the tips. Thanks for the heads up.

  2. Well, Porsche is a luxury car representing the German automotive industry. That does not mean, you will take its winter aftercare steps for granted. Obviously not. Like other automobiles, it is an automobile. So, keeping it winterized all along the Jack Frost is a must. You have to follow the same procedure for the winterization of Porsche. You need to check windshield wipers, antifreeze, battery, tires, brakes, and other electrical stuffs to winter-proof your speedster. Hiring a car-geek will come advantageous during the execution of the maintenance commotions.

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