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  1. #1
    Seasoned Member allblack's Avatar
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    Default Just bought my first diesel.

    After 55 years of mostly sensible buying decisions, I (well, the finance company) now own a oil-burner 2013 Mazda6 Ltd.

    It ticked all the other boxes, and I went with it because it was NZ-new with a full service history.

    I'm learning all about DPF's and RUC charges. No buyers remorse yet but just quietly wondering what I've got myself into ...

    The 2.2 diesel at 420Nm pulls well though, and coming from a 3.6 Commodore it's not a huge drop in low-end power.

  2. #2
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    Default Re: Just bought my first diesel.

    Yeah Iím on my first diesel now. 3l v6 turbo). The dpf/egr etc have caused me some issues.

    Namely not quite driving it enough long distances.

    But for towing, climbing hills and just driving around itís a lot of fun. I think mine works out 176kw. I came from a 3l v6 maxima.

  3. #3
    tweakedgeek tweak'e's Avatar
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    Default Re: Just bought my first diesel.

    the weird thing with dpfs, if your not doing decent range or loads, its better to drive them a bit uneconomic, and it works out cheaper to run.
    if your doing short runs, drop down a gear when going up a hill. its worse for economy but it heats the dpf up and makes it passive regen. that way it doesn't have to do a full regen which chews a lot of fuel.
    if doing long enough driving, keeping rpm down keeps heat in the engine and is more economical.
    Tweak it till it breaks

  4. #4
    Senior Member piroska's Avatar
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    Default Re: Just bought my first diesel.

    Quote Originally Posted by allblack View Post
    now own a oil-burner 2013 Mazda6 Ltd.

    I'm learning all about DPF's and RUC charges. .
    Husband had diesel for years, he went off them, only because the price went up so much, and with the RUCs it wasn't cheap anymore.
    Ex-pctek

  5. #5
    Off Limits...... beetle's Avatar
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    Default Re: Just bought my first diesel.

    We currently own 2, a Ute and a SUV (yes both Diesel )

    Im not trying to be difficult it just comes naturally.

  6. #6
    Soaring like an Eagle gary67's Avatar
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    Default Re: Just bought my first diesel.

    Even with RUC my diesel ute is still cheaper to run than an equivalent size ute in petrol and add in the extra servicing which is now 15000Km for modern diesels and its still cheaper to run.

  7. #7
    Crossmember feersumendjinn's Avatar
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    Default Re: Just bought my first diesel.

    https://www.carsguide.com.au/car-adv...-mazda-6-82356
    This is quite a common problem with the 2.2 litre diesel, have seen probably 2 dozen or so over the last few years. at the dealership I work at. The problem is caused by the injector(s) coming loose in the head, and because the base is enclosed within the rocker cover, the combustion products that escape from there ends up trapped inside the rocker cover, engine oil washes this gunge into the sump, and is picked up by the oil pump pickup. This fairly rapidly blocks the pickup and causes major engine damage/failure (e.g. engine bearings, camshafts/rocker gear, turbo etc).
    Best way to detect if this is happening is to get your mechanic to take the rocker cover off and look for thick black goo around where the injectors pass through the cover. And/or check your oil pressure. If there is, think about disposing of, quickly; there is another thing to look for, the camshafts will wear rapidly and chew deep grooves in some of the lobes (lack of oil pressure).
    We have one in at the moment.
    All in all, not a great engine design.

    If all is ok, would recommend regular oil changes (5000 km instead of 10000km), as diesel engines dilute the oil because fuel bypasses the piston rings when running, and increases your oil level.
    Last edited by feersumendjinn; 06-10-2021 at 08:51 PM.
    "...anyone who expects a source of power from the transformation
    of these atoms is talking moonshine..."
    - Ernest Rutherford (1871-1937)

    --------------------------
    "After your hands become coated with grease, your nose will begin to itch."

  8. #8
    Seasoned Member allblack's Avatar
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    Default Re: Just bought my first diesel.

    Phew thanks. Feeling much better now about my decision.

    I hear you about the oil changes. That seems a common thing.

  9. #9
    tweakedgeek tweak'e's Avatar
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    Default Re: Just bought my first diesel.

    Quote Originally Posted by allblack View Post
    I hear you about the oil changes. That seems a common thing.
    stick to what the manufacture recommends. however check the "severe conditions" list to see if it applies, as it may need a different schedule.

    the old 5000km/10000km oil change is often accident history. many now will do 30-40,000 km before oil change is required.
    diesel diluting oil really only applies on worn out engines (typically warn out injectors). not to be mistaken for engine oil which gets thinner as the viscosity improvers break down.

    however one thing to watch is some engines require very specific oil. more so with euro diesels.
    Tweak it till it breaks

  10. #10
    Soaring like an Eagle gary67's Avatar
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    Default Re: Just bought my first diesel.

    Yep most companies now recommend oil at 15000Km

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