engine sludge

engine sludge

[′en·jən ‚sləj]
(engineering)
The insoluble products of degradation of lubricating oils and fuels formed during the operation of an internal combustion engine.
References in periodicals archive ?
RAY: First of all, while denatured alcohol is a solvent, we have no idea whether it does anything to remove engine sludge.
Both Pennzoil Ultra and Pennzoil Platinum also clean out existing engine sludge that may have been left behind from inferior motor oils, a key to maximizing fuel economy.
In addition, the coatings also reduce engine sludge build-up, allowing the engine to maintain balance for more horsepower.
Diesels suffer from the problem of soot build-up to a greater extent than petrol engines and so the oil you put in the sump needs to have greater soot handling abilities to prevent the build-up of engine sludge.
Early results from the partnership included identifying the causes and chemistry of engine sludge and deposit formation, developing a fundamental understanding of low-temperature wax formation in diesel fuels, analyzing engine exhaust emissions, understanding diesel ignition and combustion, and evaluating fuel alternatives for spark ignition and diesel engines.
MB OM611 and OM441LA address a number of performance criteria, including boost pressure lost, bore polishing, cam wear, cylinder wear, engine sludge, general engine deposits, oil consumption, piston ring wear, deposits and cleanliness, ring sticking, timing chain wear and viscosity increase at 100 Celsius.
1) Pennzoil Ultra(TM) also cleans out existing engine sludge better than the brand's conventional and synthetic blend oils.
Owners of both higher-mileage and newer vehicles can drive with renewed confidence thanks to a new line of ExxonMobil synthetic-blend motor oils, formulated to help clean and restore performance of high-mileage engines and help prevent engine sludge build-up in new vehicles.
As conventional oils are more prone to sludge build-up than synthetic oils, all Pennzoil conventional motor oils are engineered to clean out up to 40% of engine sludge in the first oil change and continue to clean in the next oil change.
In 2008, Pennzoil, America's top-selling motor oil, introduced its "Feel the Clean" campaign to communicate that Pennzoil conventional motor oil can clean out up to 15 percent of engine sludge, and Pennzoil Platinum full-synthetic motor oil can clean out up to 46 percent of engine sludge -- all in the first oil change.