The cylinder liners are finished in a three-stage fluid jet honing process and with stronger piston rings in the Mark 6 GTI as opposed to the earlier MKV GTI making for a longer break-in process due to the closer tolerances between the rings and bore. Break-in time may take the entire 15,000km that the GTI is required use mineral based oil as the Volkswagen service guys indicate. The owner’s manual states that 500ml oil consumption per 1,000kms can be expected in regular use – esp. in stop/start driving with short journeys or hard core use. The manual also indicates that above 500ml oil consumption per 1,000km – perhaps 500ml to 1 litre per 1,000km – can be expected during initial break-in of the TSI motor.
When oil becomes hot, it thins out, causing some of it to slip past the piston rings and cylinder bore and be burnt up in the combustion process. Similar thing when the GTI is idling in traffic when there is a lack of cool air against the oil cooler, intercooler and radiator to keep the oil from thinning in addition to not having enough compression on the piston rings forcing them to expand to trap the oil sitting in the cross hones of the cylinder bore.
As with the last MKV GTI from new, I planned on taking a few short weeks at work and some leave to ensure that the first 20-30 hours of break-in of the Mark 6 GTI was overwhelmingly extra-urban tourist type drives with load on/load off the motor.
As stated earlier in this thread: the cross hatch section on the recessed part of the oil dipstick equates to about 1 litre of oil from top to bottom. Being 1/3rd down in 2,000km would mean that you’ve used 660ml in 2,000km – or 330ml per 1,000km. Still under the 500ml per 1,000km recommended max that the owner’s manual suggests.
Cheers
WJ
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