Increasing oil level - any idea why and is it serious? | Ask Honest John

Increasing oil level - any idea why and is it serious?

Car was serviced 5000 miles ago. The oil level has now risen. I have checked the dipstick so it is not a faulty sensor. Any idea why and is it serious?

Asked on 16 January 2015 by GT, Morecambe

Answered by Honest John

It's because the ECU is trying to actively regenerate the DPF but can't so, instead of burning off the soot in the DPF, the excess fuel injected into the engine is sinking into the sump. Needs attention or the engine will eventually start running of its own accord and could blow up.

Tags: oil technical issues

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