September 2025 Articles – What Auto Guru Covered This Month

Welcome to the September roundup. If you’ve been scrolling through Auto Guru lately, you’ve probably seen a mix of practical how‑tos and eye‑opening warnings. Below is a quick guide to the four posts that made the cut, plus the main takeaways you can apply right now.

Keeping Your Cabin Fresh and Engine Healthy

The first article, How Many Filters Does an AC Unit Have?, breaks down the typical residential AC system. Most units have three filters: the main air filter, a condenser coil filter, and a purifying filter in the ductwork. The author explains where each lives and why you should change them every 3‑6 months, especially during hot months. Replacing the filters on schedule not only improves airflow but also cuts energy bills by up to 15 %.

The second piece, What Happens If You Don’t Change Engine Oil?, reads like a warning from a friend who’s seen too many busted engines. Skipping oil changes lets sludge build up, which leads to reduced lubrication, higher wear, and costly repairs. The article outlines three stages of damage – from mild sludge to catastrophic bearing failure – and gives a quick checklist: watch oil level, listen for knocking, and feel for reduced power. Follow the schedule the car maker recommends and you’ll avoid the biggest repair bill of your life.

Performance Tweaks You Can Do Legally and Affordably

If you’re after sound, the post How to Make Your Exhaust Louder Legally tells you exactly what works without getting a ticket. The key is a cat‑back system with an active valve that lets you toggle volume. Most states cap exhaust noise at 80‑85 dB; the guide shows how to test your setup with a cheap decibel meter and stay under the limit. It also lists mods that pass 2025 inspections, so you get the roar without the court summons.

Finally, the DIY‑or‑Mechanic showdown, Is It Cheaper to Buy Brake Pads Yourself?, runs the numbers for a typical midsize sedan. In 2025, a set of high‑quality pads costs about $70 online, while a shop labor charge runs $120‑$150. Add taxes and shipping and you still save $30‑$50. The article warns about buying cheap, low‑grade pads: they wear fast and can damage rotors. The sweet spot is a reputable brand with a solid warranty – you get savings and safety.

That’s the September snapshot. Whether you’re fixing your AC, tuning your exhaust, or deciding on brake pads, Auto Guru gives you the facts you need without the fluff. Bookmark these guides, set a reminder for your next filter change, and enjoy a smoother, quieter ride.