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Dickson's 1st Auto Repair Blog

"Risky" Oil Changes?

With today's advancement, many are searching for ways to extend the time between services to save on vehicle costs. This can be a dangerous and sometimes costly practice. No any when you perform  an oil change as regular maintenance, you also inspect belts, hoses, filters and brakes. Also tires need a regular schedule for rotation to to ensure the maximum in life. Extending time between oil changes in theory seems like a great idea. But in fact it may cause harm in areas you do not even know your technician is looking.
Nothing in your engine workers harder than your oil.  With hundreds of moving parts, and thousands of explosions every minute, it’s no wonder that engine oil needs to be changed frequently!

You’ve probably heard the old rule of thumb: Change your oil every 3,000 miles or 3 months, whichever comes first. But some car manufacturers have introduced extended oil change intervals.  They figure that a modern vehicle driven under the right conditions can go for 5,000 miles or more between oil changes.

The key phrase here is “under the right conditions”. If you look at your owner’s manual, you’ll see two different maintenance schedules: one for “normal” driving conditions and one for “Severe Service”.  Severe service driving conditions include stop and go, short trips, towing, hauling, hot, cold, and dusty driving. That’s why at we often refer you to the severe service schedule in your owners’ manual, because, for most of us, that’s the way we use our cars in everyday life.

Recently, four of the largest auto manufacturers in the world have extended engine warranty coverage for engine damage caused by oil sludge resulting from longer oil change intervals.  They found that real-world conditions require more frequent oil changes than the 7,500mi interval they were recommending.  They subsequently recommended more frequent oil change intervals and proof of timely oil changes in order to qualify for the extended warranty.
Oil sludge is the culprit. Sludge is oil that has turned to a thick, jelly-like consistency.  Sludge can block passages in the engine, preventing oil from lubricating vital engine parts.  Parts wear more quickly and may fail prematurely.

Sludge is caused by several factors.  The first one is simply – time. The engine oil is contaminated by exhaust gas that eventually leads to sludge. That is where the recommendation to change your oil at least every three months comes from. Sludge can also come from oil that gets contaminated by water from normal condensation. A few minutes of driving at freeway speeds allows the oil to heat up enough for the water to evaporate. The problem is we often run errands or take other short trips that don’t allow the engine to warm up enough for the water to evaporate.  This is especially true in winter. Sludge also forms when the engine gets too hot, causing the oil to breakdown.  Stop and go summer driving, towing and hauling are all prime conditions for creating harmful sludge.  And every engine has hot spots that create sludge.
Given all of these factors, estimating when to change your oil is pretty complicated.

A couple of manufacturers have computer programs built into their vehicles that record the number of cold starts, how many times the cylinders fire, engine temperature and other factors.  From that, the computer estimates when you should change your oil and flashes a warning.  But what if you do not have a vehicle with this feature? How do you know when to change your oil? We’re not sure you really can.  Which is why it is better to be safe than sorry.  3,000 mi/5,000 km or three months – whichever comes first . 

In short, There is no doubt that today's lubricants can and will hold up longer than ever before, but if your technician only sees your car every 6, 8 or 10,000 mile, there are a lot of things that may go unnoticed until its too late.

32 Comments to "Risky" Oil Changes?:

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passat lowering springs on Saturday, January 29, 2011 2:00 AM
I never thought anything that could risk my car by chaging oil. Thanks for the info, at least we all know that now and can come up with another solution or better alternative.
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Rv Dealer on Monday, October 24, 2011 12:33 AM
The importance of oil changes cannot be stressed enough when it comes to maintaining your vehicle.The drawbacks of not having your oil changed are just way too risky. Oil changes keep all your vehicle's parts lubricated, giving these parts the ability to move.
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compensation for motor accidents on Wednesday, July 3, 2013 11:37 PM
Yes this can be a dangerous and sometimes costly practice because we have no knowledge of such type of work so we should using some professional for this work..
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Hire Forklift on Wednesday, July 17, 2013 6:34 AM
That was good information regarding to car oil. I always use to change my car's oil in every three month. That is why I still got decent mileage from it.
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Accidents happen everywhere and what we need is not an army suit or a gun. We need an extra careful. So better take care of your car with less maintenance oil without any risk.
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