Browse over 9,000 car reviews

    guides

    adventureguide

    evguide

    familyguide

    tradieguide

    urbanguide

    0 Logout

    Browse over 9,000 car reviews

    Increasing oil level in a 2012 Hyundai ix35

    Hyundai Hyundai Advice Hyundai IX35 Hyundai IX35 Advice Hyundai IX35 2012

    I have a 2012 Hyundai iX35 1.7CRDi. I have a problem with an increasing oil level due to diesel in the oil. I turned on the regeneration of the DPF filter, checked the nozzles, checked the fuel pump and everything is okay. Where can the problem be? Is it possible that it is the DPF even though the diagnostics show that it is fine?

    Answered by CarsGuide
    22 February 2024
    David Morley

    This was a huge problem for manufacturers back when turbo-diesels first started using Diesel Particulate Filters (DPF). The problems started when owners were using their diesel-powered vehicles just as they had their previous petrol cars. That is, for short, urban journeys where the exhaust system never got hot enough to perform a DPF regeneration (which is critical to the way these filters reduce tailpipe emissions).

    To counter that, some manufacturers programmed the engine to dump extra fuel into the exhaust to get it hot enough for a DPF regeneration. Inevitably, however, sometimes some of that extra fuel found its way past the piston rings and into the engine's sump. And suddenly, there was more oil in the sump one day than had been there the previous day.

    The problem there was that the diesel now in the sump was actually diluting the engine's lubricating oil, and that could lead to accelerated engine wear and bearing failure. The best solution – then and now – is to make sure you drive the vehicle at freeway speeds for at least an hour every three or four weeks. That will get things hot enough for the DPF to regenerate if it has to, and not rely on the extra diesel the computer will pour into the engine.

    You could be looking at a specific DPF problem or maybe a software glitch that is messing up the regeneration, but if the level on the dipstick is rising, then I'd say that's your problem.

    Disclaimer: You acknowledge and agree that all answers are provided as a general guide only and should not be relied upon as bespoke advice. Carsguide is not liable for the accuracy of any information provided in the answers.
    Other Hyundai IX35 Problems
    SELL ALL HYUNDAI IX35 PROBLEMS
    Related cars for sale on CarsGuide
    See more Hyundai IX35s for sale

    Comments

    Have a new question for the CarsGuide team?
    More than 9,000 questions asked and answered.
    Ask now
    Complete guide to Hyundai IX35 2012
    Complete guide to Hyundai IX35 2012 CarsGuide Logo
    Reviews, price, specs and more