Here's one of my columns from a year or two ago on this very subject. :
Proper preparation ensures vintage cars can sleep soundly during the winter
After the long, beautiful summer, the current onslaught of rain simply depresses me. I just got so darn used to driving my old cars almost daily. Even my daughter keeps asking me if the old cars are now “broken,” as we pass them by in favor of Mommy’s Oldsmobile. I explain to her the time has come to pack the less winter-friendly vintage rides away for the winter.
If you have show cars that would lose value if exposed to mud, or vehicles like my Triumph TR-3 offering all the winter weather protection of the 50-yard line at Green Bay’s Lambeau Field, you might decide to put them into hibernation from November until late March or April.
Sound Classics faithful will remember our springtime discussion regarding readying a classic for the summer driving season. Our expert for that column, mechanic Bret Swearingen of Madrona Autoworks, indicated good preparation in the fall eases the amount of time, effort and money it takes to drive safely and reliably in the warm weather months.
So the first step should be to thoroughly wash and wax the car’s exterior, as well as vacuum and dust the interior. Any contaminants left on exterior or interior surfaces will likely bond by the end of winter, meaning spots, stains and smells will be significantly harder to remove. Use paint cleaning clay to remove sap, tar, insects and bird droppings. I also like to drop a fabric softener sheet (like Bounce, or equivalent) under the seats to keep the interior smelling fresh.
For drop-tops and roadsters, store with convertible tops up or tonneau covers attached, or in March they’ll fit as well as a size two dress on Oprah.
Always store cars with a full tank of gas, because the lower the fuel level, the greater the chance of rust forming in the tank. Don’t skimp by filling-up with discount fuel. A friend of mine worked for years as a scientist in the fuel industry, and she explained to me that while different fuel brands are often sourced from one refinery, the detergent additive packages added by each company are very different. Texaco uses the best combination of additives to keep systems clean and the fuel itself from turning to varnish. Mobil and Exxon also utilize good additives. Discount brands sold at grocery store stations are the worst. In general, discounted rates are a result of skimping on additives. Wintertime urban oxygenated fuels also should be avoided, as this fuel can begin turning bad in as little as two weeks.
No matter what fuel you use, add some fuel stabilizer. The last time Jay Leno forgot to utilize fuel stabilizer during storage, fuel varnish clogged a valve in his Jaguar XK-120 causing a valve-to-piston collision (resulting in an expensive engine rebuild.) Now Leno never forgets to add Stab-il brand stabilizer, the smelly red liquid just about everyone I know uses to prevent fuel breakdown.
Next you should change the oil. Changing the oil for storage (and then changing it again coming out of storage,) prevents contaminants from bonding to engine internals. Nice new oil will protect engines from seizing. Similarly, make certain the vehicle’s cooling system is a good mix of antifreeze and water. Nothing ruins a cooling system more quickly than a mixture of too much water and not enough (or no) antifreeze. To prevent radiator rusting, ensure the fluid is to the fill line.
Batteries should be disconnected and removed to prevent electrical fires, as well as protect the quality of the battery from parasitic losses. Fully charge with a battery charger prior to storage, and attach a trickle charger like Battery Tender to maintain the quality of the battery during the cold months.
To save your tires from flat spots, use a floor jack to lift your car and place the vehicle on four secure jack-stands. Refer to your manual for appropriate jacking points. If you have children, you might consider roping-off the area to prevent anyone from playing around a lifted vehicle.
Finally, fit your vehicle with a soft, breathable cover. Make certain the car cover is clean, as dust on the cover will scratch your car’s paint when shifting during the winter.
By following these steps, you can be sure that when the sun emerges from its winter vacation, your classic will be ready to roll for another long warm cruising and show season.
Sam Barer runs Apex Features, an Olympia-based writing company. Submit questions or cars for profiles to soundclassics@apexstrategy.com[/i]