Every fall, shops run "winter prep specials." A lot of what's on that list isn't necessary. Fix any warning light or existing problem first. After that, tires and battery matter most, a few other basics are worth a look even if nothing's due, and a few driving habits matter no matter what.

Here's what that looks like.

Tires

All-season tires hold up fine in mild cold, but they're not built for real snow and ice. Once temperatures sit near or below freezing, the rubber stiffens and grip drops, no matter how good the tread pattern looks.

If you're somewhere that gets real snow and ice, dedicated winter tires are the single biggest safety upgrade available. Tire Rack's own testing consistently shows winter tires stopping shorter than all-seasons on packed snow and ice, often by multiple car-lengths at neighborhood speeds (Tire Rack, "All-Weather vs. Winter Tires: The Definitive Test," accessed 2026-09-28).

Staying on all-seasons through winter? Check your tread with a tread-depth gauge, not just a coin. Snow traction typically holds up down to about 6/32", deeper than the roughly 4/32" replacement point commonly used for wet grip. The classic quarter test (Washington's head down in the groove) only confirms whether you're above or below about 4/32", so it can say you're fine even when you're already below the snow threshold. If it's close, check with a gauge or ask a shop to measure it before the first storm.

Battery

Cold weather is hard on a weak battery. If yours hasn't been tested this fall, get it checked before winter, not after it fails on a cold morning. AutoZone, O'Reilly, and Advance all test batteries free, no appointment needed.

A few other basics

Worth a look even if nothing's flagged it yet: tire pressure (cold air drops it fast, check it when tires are cold), wiper blades that streak or skip, washer fluid rated for freezing temps instead of plain water, and coolant concentration if it hasn't been checked in a while. None of these need a special "winter service," just doing them now instead of after the first cold snap. Worth keeping in the car too: a blanket, a phone charger, water, and any medication you can't go without. Doesn't need to be much, and it matters more than anything on a shop's upsell list if you're ever actually stuck.

Driving in it

A few habits matter more than any product on a shop's upsell list:

If the back of the car starts to slide (a rear-wheel skid), ease off the gas and steer gently toward where you want to go. If the front end pushes wide and won't turn (a front-wheel skid), ease off the brake and gas until the tires grip again, then steer where you want to go. If your car has ABS and you need to brake hard on ice or snow, press the pedal firmly and hold it, that's what ABS is for. Not sure if you have it? Check the owner's manual, and pump the brake instead of holding it down if you don't. Give yourself more following distance than feels necessary, skip cruise control on anything that could be icy, and if the road is worse than you're prepared to handle, slow down or pull off and wait it out. That's not overreacting.

Black ice is worst at night and early morning, and it hides on bridges, overpasses, and shaded stretches of road before it shows up anywhere else.

If you get stranded

Stay with the vehicle so you're easier to find, and make it visible if you can (flashers on, something bright tied to the antenna or mirror). Check the tailpipe, and keep checking it as snow keeps falling: a pipe packed with snow can push exhaust back into the cabin, and carbon monoxide has no smell, so you won't notice until it's already a problem. Clear the tailpipe, crack a window, and only run the engine in short stretches, about ten minutes an hour, to stay warm without wasting fuel or building up fumes. If anyone in the car gets a headache, feels dizzy, or seems confused, shut the engine off, call 911, and get everyone to fresh air right away.

What you can skip

Fuel injector cleaners address carbon deposits, and gas-line antifreeze addresses water in the fuel line freezing. Both solve real problems, but neither needs to go in preventively every winter on a modern fuel-injected car with no fuel-related symptoms; follow the owner's manual if it calls for something specific. "Winter tune-up" packages usually repackage maintenance that's either already on your schedule or not needed at all. Premium de-icer washer fluid helps with heavy frost, but standard fluid rated for freezing temperatures covers the rest.

None of that means a shop offering these is trying to take advantage of you; diagnosing a real issue takes time and shop labor isn't free. It just means these specific add-ons rarely apply to a modern vehicle.

If a shop quotes you for any of this and the number feels off, run it past us first. Five questions, no cost, no obligation.