My daughter's small (non landy) car is eating oil at around 1/2 to 1 l perweek. No leaks and no smoke or oily smell from the exhaust. So where is it going???![]()
Jim VK2MAD
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'17 Isuzu D-Max
Thanks Hiline for your attempted humour. This is a serious question for those mechanical types out there to offer a response worth reading. Better luck next time. Jim
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Jim VK2MAD
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'17 Isuzu D-Max
Hi , it may well be escaping into the bell housing through the rear main seal. Check to see if there is a drain plug at the bottom of the bell housing and undo it to see if any oil runs out. This may not apply to automatic cars. Cheers, 130man.
Jim
How many Ks in a week? if its not leaking it must be burning it let it idle for a few minutes and then give it a good rev and see if it blows smoke.
How many Ks has the engine done? when was the oil changed last?
Does it have the right grade of oil?
Has it happened all of a sudden or is it something that has got progressively worse?
Hi djam1. The motor was an exchange unit after the original motor dropped a timing belt and blew the motor big time...everything was bent. However I think it was a second hand motor fitted and has "used" oil ever since. The motor and gearbox is free from loose oil so the only thing I can think of is that somehow it does burn it. The car is serviced regularly with correct grade oil. The last time it was serviced I asked the mechanic about this problem and he indicated it was normal for these vehicles. However the original motor was ok. Thanks for your ideas. I will have to look further. Jim
Jim VK2MAD
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'17 Isuzu D-Max
Not a Mitsubishi is it??
There are only three ways that I can think of that you will lose oil from an engine:
leaking gaskets/seals,
out into the cooling system (small minor loss when something has gone wrong usually head gasket) and
the most likely given no signs of a leak is for it to be burnt in the combustion chamber and out the exhaust.
Of all the above the third is mostlikely for a worn engine and the mechanisms would be via valve guides, bypassing the oil scrappers and compression rings or from resulting blowby where the crankcase gases are picking up oil vapours and is being burnt via the crankcase gas recirculation system.
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