Oil Dilution (Diesel)
SeriousEngineInterrupted DPF regenerations cause unburnt fuel to leak into the oil sump, raising the oil level and thinning the lubricant.
Most affected: 1.8 DI-D, 2.2 DI-D diesel engines
Estimated cost: £150–£300 (Oil change & forced regen)Affects: 2010–2018
Typical symptoms
- •Oil level above the "X" mark on dipstick
- •Check engine light
- •Reduced engine performance
What to inspect before you buy
- ✓Check the dipstick for an "X" mark above the Max line
- ✓Verify frequency of long-distance trips