The 1.8T engine is listed as one of the engines that has a problem with sludge accumulation.
What is sludge?
or black sludge
is a solid
in motor oil
caused by the oil gelling or solidifying, usually at temperatures lower than 100 degrees Celsius
. Sludge can be a major contributor to engine
problems, and can require the engine to be replaced if the damage is severe. Sludge is usually caused by the presence of water
in the oil, and can accumulate with use.
Sludge can be countered...Frequent oil changes (every 3k miles is now the general rule, however in the average engine it's really only needed every 6k) So, more frequent oil changes, KEEP UP ROUTINE MAINTNENCE (normally listed in your manual), using synthetic oils also helps.