Another Mazda Diesel engine failure.
After the turbo failure i would have expected the sump to be removed for oil pick up inspection, or if of a suitable design to be inpected via camera throughthe sump drain hole..
Do you know at this point that a blocked oil pick up strainer is the issue leading to failure? has anyone removed or stripped the engine down to discover the reason for failure?
It all depends on whats gone wrong, if its heavy carbon build up that has blocked the oil pick up strainer then i believe all the flushing oil in the world won't shift it, its got to be cleaned manually, but why is the strainer blocked (if thats the reason), could the engine have a failing injector seal allowing compression blow by, this is a big problem with some modern Diesels, it didn't affect Diesels of old with injectors fitted from the oustside like spark plugs, you would see such leaks and even if ignored the engine would come to little harm.
If it is a blocked oil pick up it might be interesting to whip the rocker cover off and see what the state of things are re the injectors, it will be pretty obvious if injector blow by is a contributory cause here.
The reason for more frequent oil changes, why some of us here give some car makers ideas of long life servicing a healthy ignoring, is not that modern oils don't last, its to remove the nasties that build up in the oil (thankyou EGR) and cause serious issues, truck engines have oil spinners that remove much of the carbon build up hence why heavy trucks can go 100k kms between oil changes.
Finally, you can only expect Toyota standards of customer care and responsibility (and pride where due) in their product from Toyota.
IMHO and personal experience owning a (petrol) Mazda car for 17+ years and from reading experiences from other owners on here and owners' forums, post-sales, Mazda are very much hit and miss as regards customer service at their franchised main dealers. Mine has generally been decent to me, but on occasion they have not done such a good job on the customer service front. I know of one person who used it in the past and had a terrible time.
In addition, that Mazda UK, as FP says, aren't very helpful in many circumstances, though some improvement in customer service from them has been made from what I hear, but seemingly not anywhere near enough.
Owning a petrol (non rotary-engined) car, makes the post-sales experience so much better, because they are seemingly far more reliable. In particular, the port-injected type engines.
The newer direct injection and latest HCCI engines have suffered from a few issues, but not that much - issues with newer cars, as with most cars (of preactically any make) these days are with electrical and controls systems, due to the sheer number of gadgets and gizmos they have. It's how the dealerships and UK Head Office deal with such things that makes the difference between a good make and a not so good one.
It's also the reason why I:
a) concur that buying a modern diesel for the most part is a risk second hand, unless you 100% know its ownership history and that includes how it was driven - as in long trips or short ones from cold predominantly, DPF problems, oil changes, etc, etc, and;
b) would not buy a car which has brand new tech in it that plays a significant role in the car's normal use, e.g. the engine design. I would wait until the tech has been in operation for a good 2-4 years (especially fundamentally new designs) before even thinking about buying a car with it in.
It means that any flaws either become apparent and are fixed or aren't (for various reasons) and the decision makes itself.
A brand new Mazda diesel may be fine if used and maintained properly, i.e. longer distances and regular oil changes, maybe more than usual depending on use.
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