Thom's Four Wheel Drive

Today in the Thom's Four Wheel Drive auto care blog, we're going to talk to CHICAGO drivers about oil change intervals. It seems that as engine technology advances, oil change intervals become longer for Thom's Four Wheel Drive customers. For example, recently four of the world's largest vehicle manufacturer's shortened the published intervals for several of their engine models. They originally published intervals that extended out to a much as 8,000 miles (13,000 kilometers).In real world CHICAGO driving, the oil started to sludge up before the recommended change interval. Oil sludge is a thick jelly-like substance: quite literally petroleum jelly – like Vaseline. This goop was clogging vehicle small engine passages so the oil wouldn't flow to some parts of the engine. This resulted in engine damage. We see it too often at Thom's Four Wheel Drive in CHICAGO.The vehicle manufacturers began to offer an extended warranty to cover sludge damage. But there was a cat ... read more

When asked, most people think they are good at multi-tasking. Scientific studies, however, reveal that only around 2% of the population can truly demonstrate the capacity to effectively multi-task. For the rest of us who are not so biologically wired, no amount of practice can increase our effectiveness at multi-tasking. Turns out, multi-tasking is almost a superpower. Think of fighter pilots: capable of maintaining their orientation in three dimensional space and performing specific and highly complicated functions while accessing life threatening situations and coming up with an appropriate response. Admit it – you can’t do that. Yet when it comes to driving, we seem to think we are very capable of safely operating a motor vehicle with myriad distractions. 77% of young adults feel somewhat confident that they can safely text and drive while 55% claim it’s easy to text and drive. Can they possibly be right? Let’s look at some statistics. Nearly 23% of all accid ... read more

Those who know vehicles believe the steering system may be the most vital component of them all. Perhaps you've found over the years your steering has gotten loose. Or maybe suddenly, your steering wheel has gotten very hard to turn. Let's steer you in the direction of understanding why this may be happening. First, loose steering. This can likely be the result of wear and tear on the components that connect the steering mechanism with the wheels. Those parts can be ball joints, Pitman arms or tie rods. These parts take a lot of abuse on the road, thanks to railroad tracks, potholes, uneven surfaces: you name it. It's important that they be checked regularly and maintained at Thom's Four Wheel Drive. Second, the hard-to-turn wheel. Virtually all vehicles on the road have power steering. There are a couple of different types, though, so let's deal with each. By the way, when they fail, your vehicle's steering can suddenly go from easy peasy to really hard to control. Some vehicles have ... read more

Oil changes are probably the most recognized service on a vehicle. Almost all CHICAGO residents know about them. But do we know enough?Several decades ago, oil changes were fairly standard: every three months or 3,000 miles or 5,000 kilometers. But recent advances in both engine technology and oil quality have led to longer oil change intervals.Delayed or skipped oil changes are a problem for CHICAGO residents because they lead to the build-up of oil sludge in your engine. Oil sludge forms when engine oil breaks down, which happens with both time and miles. Obviously, driving will take its toll on engine oil, but the oil also breaks down even as the vehicle just sits in the garage. This is why oil change intervals are listed in both time and distance traveled, and the phrase “whichever comes first” is applicable.Oil sludge is essentially petroleum jelly. Imagine this stuff squishing around in your vehicle engine, pushing into small engine passageways and blocking pass ... read more

The crankcase is the lower part of the engine where the crankshaft is housed and where the engine oil lives. The crankshaft is connected to the pistons that power the engine. When you are diving around CHICAGO, fuel is burned in your vehicle engine, it pushes the pistons down and the crankshaft rotates and sends power to the transmission. Some of the explosive gases from combustion squeeze past the pistons and down into the crankcase.Now this gas is about 70% unburned fuel. If it were allowed to remain in the crankcase, it would contaminate the oil and quickly turn it to sludge. Sludge is like Vaseline and clogs passages in the engine, leading to damage. Also, the pressure build up would blow out seals and gaskets. So in the old days, there was just a hose that vented the crankcase out into the air. Obviously, not good for our air quality in CHICAGO, Illinois.Enter the PCV valve. It's a small, one-way valve that lets out the gases from the crankcase and routes them back into ... read more