The opposite problem may also appear. Found in many 2004-2008 models with the same size engines (but with three valves per cylinder), a unique spark plug design with a two-piece shell has been known to separate, leaving the lower portion stuck deep in the motor. Ford distributes special tools for removing the seized plugs. Repairs can be surprisingly expensive – and frustrating.

If consumers are being denied repairs and rebuilds on engines that consume too much oil, those cars could end up unloaded onto used-car lots by folks sick of adding oil. That just passes the problem on to the next owner.

For some automakers, though, that appears to be an optimistic claim. In our survey of owners of about 1 million vehicles stretching back 10 years, we found that for certain models, significant numbers of consumers have to add a quart of oil to their engines as frequently as every month.

Dennis is run for the benefit of the Heart of England Forest, a registered charity dedicated to planting tomorrow’s great native woodland one tree at a time.

If a driver has to add a quart of oil once per month, that can mean adding up to 7 to 9 quarts of oil between oil changes. Those costs due to excessive oil consumption can add up because automakers more frequently require synthetic oils that can cost upwards of $9 per quart—in addition to the expense of the routine oil changes.

Honda recently issued a warranty extension to eight years or 125,000 miles for 2008 to 2011 Accord and 2010 to 2011 CR-V four-cylinder engines. Honda said it had found that sticking piston rings could lead to higher oil consumption if the engine is revved hard when cold, when combined with prolonged usage of low-quality gasoline.

Ford acknowledges this issue in TSB 07-21-2. Ford’s authorized repair procedure for out-of-warranty vehicles prescribes an aluminum insert and tool kit. Reportedly, the 5.4 L “Triton” truck engine is the worst.

The oil-change industry has long prescribed changing your oil every 3,000 miles. In recent years, most automakers have stretched that to 7,500 or even 10,000 miles because refinements in engine manufacturing and oil technology purportedly allow engine oil to last longer.

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If your car requires frequent topping off of its oil due to excessive oil consumption, you might have recourse from the automaker.

The worst case showed that, overall, owners of BMW 5 Series vehicles with V8 engines were 27 times as likely to suffer excessive oil consumption as owners of an average vehicle.

Owners have reported spark plugs blowing out of their engines and, in one instance, right through the hood (!).

If a car does consume oil under warranty, Consumer Reports believes the automaker should cover the repair costs for current owners and pay to top off the oil in between changes—and not just improve the engine’s design for future buyers.

Consumer Reports data does not show a direct connection between increased oil consumption and other engine problems. But our survey data concerning 10 model years shows that if a car burns oil early in its life, it will burn even more as it ages. In tracking oil consumption by model year, engine families show increased consumption with each successive year on the road.

The small but powerful 2.7 L V6 commonly found in the 2004 and older Chrysler Intrepid, Concorde, LHS and Sebring/Stratus models is notorious for oil sludge formation.

Sludge and coke (carbon) buildup on the very fine oil pickup screen in the oil sump can starve the engine of oil, resulting in complete engine failure. Experts suggest this may be due to the catalytic converter being mounted below the sump, cooking the oil at high temperature.

In a recent technical service bulletin, Audi recommended that “the customer always have a spare quart of engine oil in case the engine oil needs topping off while on the road.”

The National Highway Traffic Safety Administration has been
investigating the possibility of engine stalling in the Corolla and
Matrix models since late November.

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I would like to see the repair history of your car or the defect and repair report from the mechanics at Nakawa where your Nadia was repaired. It would be useful to know whether the cause of your first breakdown had something to do with the fuel pump. If so then removal of the fuel pump in the tank may have affected operation of the fuel gauge which is attached to the pump.

Thank you for your educative articles and features in the magazine. Please elaborate on the following types of engines, showing their pros and cons:
1. Electronic Fuel Injection (EFI)
2. D-4 or GDI

Many experts disagree, suggesting a defect in the breathing or circulation system is the likely culprit.

The test measures how much oil you consume over several weeks of driving. If your car’s oil consumption exceeds the manufacturer specifications and it’s still under its original powertrain warranty, Consumer Reports believes the dealer should repair or replace the engine free of charge. Some extended warranties will cover the problem. However, if your car is consuming oil, but at a rate less than the manufacturer guidelines state is excessive, you could be in for a legal battle.

Toyota Engine Problem Solved

There are at least eight mass-produced engines today that have caused owners a lot of anguish, according to their grievance reports on the Internet.

Without copious oil, the engine’s apex seals can wear prematurely, resulting in lower compression and requiring an engine rebuild at a relatively early age.

His working model demonstrated that a four-stroke design could work reliably in an engine compact enough to power a motorcycle and, eventually, an automobile.

Consumer Reports believes that any engine that burns oil between changes should be repaired under the powertrain warranty. But automakers often shield themselves in the fine print of their owners’ manuals.

The pros: these three are easier to park, tough with all-wheel drive (Pajero io and Escudo have 4WD option), reliable, comfortable and trendy. The cons: tight rear passenger leg room and load space, high speed cornering maneouverability and road dynamics are limited by their size, they feel light when driving on the highway.
The small medium SUVs cost between Shs30-35m Uganda shillings. Parts are available at their respective authorised dealers or independent sellers downtown. The popular bigger three -oor medium SUVs in your Shs40m budget range are the 1999-2000 Pajero and Prado. They have a good parts support from the authorised dealerships and independent outlets in town. The bigger medium SUVs pros: better road holding and handling for highway and off-road up country terrain, these two are tough four wheel drive vehicles, better rear passenger legroom and loading space. They also have a good resale value. You have a choice between the Pajero and Prado.

 Cars under warranty shouldn’t burn oil. And most don’t.

Apparently, Audi/VW may not have informed owners that the engine required synthetic oil, so owners (and dealers) proceeded to use conventional oil after the break-in period. The usual coke/sludge issues appeared and engines failed in considerable numbers. Models from 1997 to 2004 are affected – essentially any car wearing the 1.8T badge.

Toyota settled a class-action lawsuit in 2007 that covered an estimated 2.5 million Toyota and Lexus models made between 1997 and 2002 susceptible to engine sludge. The automaker agreed to repair sludged engines for up to eight years after leaving the factory.

Chrysler made some design changes in later engines, but anyone with this lump under their hood should monitor oil level frequently and perform oil changes religiously.

The defect affected numerous GM models made between 1995 and 2003.5. GM eventually caved in to the lawsuits and announced a settlement that specified the replacement of the lower intake gasket within seven years or 150,000 miles of the date of initial delivery.