Preferred Auto Specialists
6300 Oxford Avenue

Engine and Exhaust

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Why did my vehicle fail its emissions test?

We all want to breathe clean air and keep our planet green.  One of the ways to do that is by requiring all vehicles with internal combustion engines to pass an emissions test.  That’s...
Published on: Mar 16, 2025

Diesel Exhaust Fluid

Diesel engines are appearing in more and more vehicles in nearly every category from compact cars to pick-up trucks to high-performance luxury vehicles.  In much of the world, 40% or more of pass...
Published on: Nov 17, 2024

Exhaust Service at Preferred Auto Specialists

Driving around Philadelphia, we've all heard a car or truck that needs a new muffler. But there's more to the exhaust system than just the muffler. The exhaust system has three main functions: Safe...
Published on: Oct 22, 2023

The Test Your Vehicle Can Fail (Emissions Tests)

Clean air quality is something that helps all of us thrive here on Planet Earth.  And considering that motor vehicles are a contributor to air pollution, emissions tests in the U.S. and Canada ar...
Published on: Feb 07, 2021

EGR Valve

It is pretty amazing how auto makers have been able to consistently build more powerful engines in vehicles that get better fuel economy while at the same time meeting increasing environmental standar...
Published on: Dec 22, 2020

Exhaust

We’ve all heard a car or truck that needs a new muffler.  But there’s more to the exhaust system than just the muffler.  The exhaust system has three main functions: To safel...
Published on: Apr 12, 2018

Simple Answers from Preferred Auto Specialists for Philadelphia: Exhaust Service

{{ image('MzQy') }} Question:My car failed its emissions test – what do I need to do?Preferred Auto Specialists Answer:Let's get this out of the way: a leak in your exhaust system could be ...
Published on: Jul 04, 2016