Autos

Preparing Your Car for a Long Road Trip

Autos Editorial Team 6 min read · Apr 6, 2024
Preparing Your Car for a Long Road Trip

Photo credit: Glowwwatch.com

In this article
  1. Why a Pre-Trip Check Is Worth the Time
  2. Tools and Supplies to Have on Hand
  3. What to Do If You Find a Problem

A practical pre-trip checklist covering tires, fluids, brakes, emergency supplies, and other factors worth checking before a long drive.

Key Takeaways

  • Tires, fluids, and brakes are the three most critical systems to check before any long drive.
  • Most pre-trip checks take under two hours and require only basic tools.
  • A well-stocked emergency kit can make a breakdown manageable rather than dangerous.
  • Catching a small problem at home is far less costly than dealing with it on the road.
  • Your owner's manual is the most reliable source for fluid specs and service intervals.

Why a Pre-Trip Check Is Worth the Time

A long road trip puts sustained stress on your vehicle in ways that ordinary commuting doesn't. Highway speeds, extra weight from luggage and passengers, and hours of continuous engine operation can turn a minor issue into a roadside breakdown. The good news is that most problems are detectable before you leave — if you know what to look for.

This checklist is designed for everyday drivers, not mechanics. You don't need special training to check tire pressure, top off fluids, or test your lights. What you do need is about an hour and a willingness to actually look. For a broader picture of what regular upkeep involves, see our guide to routine car maintenance.

Tires

Check tire pressure on all four tires — including the spare — using a gauge and compare to the recommended PSI on the sticker inside your driver's door jamb (not the number on the tire itself). Our tire pressure walkthrough explains how to read and adjust correctly. Must
Inspect tire tread depth using the quarter test: insert a quarter upside down into the tread groove — if you can see all of Washington's head, the tread is low and replacement should be considered. Must
Look over each tire sidewall for cracks, bulges, or embedded objects that could cause a blowout at highway speed. Must
Confirm the spare tire is properly inflated and that the jack and lug wrench are in the vehicle and accessible. Should

Fluids

Check engine oil level with the dipstick when the engine is cold; top off or change the oil if you're within 1,000 miles of your next scheduled interval. Must
Inspect coolant (antifreeze) level in the overflow reservoir; low coolant on a long highway run can lead to overheating. Must
Check brake fluid level in the reservoir under the hood; if it's near or below the minimum line, have a mechanic inspect it before driving. Must
Top off windshield washer fluid — it goes quickly on highway drives with road grime and bug splatter. Should
Check power steering fluid and transmission fluid levels if your owner's manual recommends doing so at routine intervals. Nice to have

Brakes and Belts

Listen for squealing or grinding sounds when you apply the brakes during a slow test in your neighborhood — either sound warrants a mechanic's inspection before a long trip. Must
Visually inspect the drive belt (also called the serpentine belt) through the engine bay for cracking, fraying, or glazing; a snapped belt will leave you stranded. Should

Lights and Electrical

Test all exterior lights — headlights (low and high beam), taillights, brake lights, turn signals, and hazard flashers — with help from another person or by using reflections. Must
Check that your dashboard has no active warning lights; look up any unfamiliar symbols in your owner's manual and address them before departing. Must
Test the battery by checking for corrosion on the terminals and confirming the engine starts without hesitation; batteries older than four years may warrant a load test at an auto parts store. Should

Wipers and Visibility

Run your windshield wipers and check for streaking, skipping, or squeaking — replace blades that leave uncleared streaks, as visibility in rain at highway speed is critical. Must
Clean the interior of all windows to eliminate glare, especially important for night driving. Should

Emergency Kit

Pack a basic emergency kit including jumper cables or a portable jump starter, a flashlight with fresh batteries, reflective triangles or road flares, a first-aid kit, and a basic tool set. Must
Carry at least one gallon of water per person for emergencies, plus extra coolant and a quart of the correct engine oil for your vehicle. Should
Keep a printed copy of your insurance card, roadside assistance number, and emergency contacts in the glove box in case your phone loses power or signal. Should
Pack a blanket and basic snacks in case of an extended breakdown in a remote area. Nice to have

Tools and Supplies to Have on Hand

You don't need a full workshop to run through this checklist. A handful of inexpensive items will cover everything below — and several of them should stay in your car permanently as part of an emergency kit.

Required

Tire pressure gauge

Accurately measures PSI in each tire so you can inflate or deflate to the correct level.

Required

Flashlight or work light

Lets you see into the engine bay, under the vehicle, and inside the trunk clearly.

Required

Clean rags or paper towels

Used for wiping dipsticks and checking fluid colors and conditions.

Optional

Portable jump starter

Allows you to restart a dead battery without needing another vehicle nearby.

Optional

Tread depth gauge

Gives a precise tread measurement if you want a more accurate reading than the quarter test.

Required

Owner's manual

The definitive reference for your vehicle's fluid specifications, tire pressure, and service intervals.

What to Do If You Find a Problem

If a check reveals something beyond a fluid top-off — worn brake pads, a bulging tire sidewall, a warning light you can't explain — don't ignore it. Have the vehicle inspected by a qualified mechanic before your trip. Postponing a repair until after a long drive can turn a manageable fix into a much costlier one, or worse, a dangerous situation far from help.

Don't Drive on a Known Problem

If any check reveals a safety concern — low brake fluid, a cracked sidewall, a warning light you can't identify — have it evaluated by a qualified mechanic before you leave. Road trips amplify existing issues; what's manageable in your driveway can become dangerous at 70 mph. No timeline is worth putting yourself or your passengers at risk.

For a quick pre-departure walkthrough you can run right before pulling out of the driveway, see our pre-trip safety checklist. And if you're heading into extreme heat or cold, seasonal car care guidance covers additional checks worth doing before those conditions.

Check Fluids When the Engine Is Cold

Checking coolant or removing the radiator cap on a hot engine can result in serious burns from pressurized steam. Always let the engine cool for at least 30 minutes before opening the coolant reservoir. Oil readings are also more accurate on a cold engine.

This article is for general informational purposes only. Always consult a qualified mechanic if you are unsure about your vehicle's condition before driving.

Autos Editorial Team

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Autos Editorial Team

Autos Editorial Team is the collective byline for our editorial team and contributor network. Articles published under this byline or an editorial pen name are researched, written, and reviewed according to our editorial standards for clarity, consistency, and independence before publication.

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The content on this site is for informational purposes only and is not a substitute for professional advice. Always consult a qualified professional for guidance specific to your situation.