Be Prepared Before Problems Strike
Regular vehicle maintenance prevents breakdowns, extends engine life, and saves money on costly repairs. Smart car owners keep a small stock of the most commonly replaced parts on hand — so when the time comes, they're ready to act immediately rather than wait for shipping or hunting down parts at the last minute.
Here are the 10 most essential auto parts to keep stocked.
1. Spark Plugs
Worn spark plugs cause misfires, rough idle, poor fuel economy, and hard starts. Keep a set of correctly-spec'd plugs for your vehicle on hand. For most modern vehicles, iridium plugs from NGK or Champion provide long intervals (60–100K miles) but it's smart to have a set ready when the time comes.
Shop: Spark Plugs | NGK | Champion
2. Engine Oil Filter
Always have an oil filter ready before your next oil change. Buying filters in multi-packs or keeping one extra on the shelf ensures you're never caught without one when it's time to change the oil.
Shop: Oil Filters
3. Air Filter
A clogged air filter restricts airflow to the engine, reducing power and fuel economy. Engine air filters typically need replacement every 15,000–30,000 miles depending on driving conditions. Keep one on hand — they're inexpensive and take less than 5 minutes to change on most vehicles.
Shop: Air Filters
4. Fuel Filter
Fuel filters protect injectors from contaminants in the fuel. Many modern vehicles have in-tank fuel filters that last 60,000+ miles, but inline fuel filters (on older vehicles) may need replacement every 30,000 miles. Check your maintenance schedule and keep a spare if applicable.
Shop: Fuel Filters
5. Ignition Coil
Modern coil-on-plug ignition systems are generally reliable, but coils do fail — especially on high-mileage vehicles or after heat cycling. A failed coil causes a specific cylinder to misfire (P030X code). If you drive an older vehicle or have noticed intermittent misfires, keeping a spare coil for your vehicle's most common failure point is smart.
Shop: Ignition Coils
6. Permatex RTV Silicone Sealant
Permatex RTV (Room Temperature Vulcanizing) gasket maker is one of the most useful products in any home garage. Use it to seal valve cover gaskets, water pump seals, thermostat housings, and anywhere a formed-in-place gasket is needed. Keep a tube of Permatex Ultra Grey or Ultra Black on hand — it's essential for many common repairs.
Shop: Automotive Chemicals
7. Permatex Thread Locker
Blue Loctite (or Permatex Blue Threadlocker) prevents fasteners from vibrating loose — critical for suspension components, exhaust manifold bolts, and sensor housings. Red thread locker provides a permanent hold for critical fasteners that should never come loose.
8. Lucas Oil Engine Treatment
Lucas Oil's petroleum-based engine treatment is a popular additive for reducing wear in high-mileage engines. It's especially useful when rebuilding older engines or treating vehicles with minor oil consumption. A quart on the shelf is worth its weight for peace of mind.
Shop: Lucas Oil Products
9. Penetrating Oil / Anti-Seize Compound
Permatex Anti-Seize is essential when installing spark plugs in aluminum cylinder heads (which is virtually every modern engine). It prevents the plug threads from seizing in the aluminum over time, making future removal far easier. Never install spark plugs in aluminum without anti-seize or the plug manufacturer's specified installation method.
10. O2 Sensor (for High-Mileage Vehicles)
If your vehicle is over 100,000 miles and you've never replaced the oxygen sensors, consider keeping a replacement upstream O2 sensor on hand. Sensor failure is unpredictable, and having a spare means you can address the issue the same day rather than waiting for parts.
Shop: Oxygen Sensors
Shop All Essential Parts at Texan Supply Company
We stock all of the above and much more at Texan Supply Company. Browse our full collection catalog for NGK, Champion, ACDelco, Motorcraft, Permatex, Lucas Oil, and Autolite products. Fast shipping on every order.