Diesel Oil Dilution & Interrupted DPF Regeneration Turbo Wear
SeriousEngineFrequent short journeys interrupt active DPF regeneration cycles, causing unburnt diesel to wash down the cylinder walls into the engine sump. Thinning oil destroys the ceramic balance shaft bearings and turbocharger thrust bearings.
"Service Required" message appears just 5,000–8,000 miles after last service, Electronic oil level display reads "Engine Oil Overfilled", High-pitched siren whine from turbocharger on boost
- Check oil level via digital dash menu before starting engine; if "Overfilled", oil dilution is severe
- Check frequency of oil services on JLR online service history