1HZ Using oil

I would be hardly concerned with 1lt per 5000K, could be going out the exhaust....... using oil is not a bad thing but it does depend on how much.

How many K's has it done.

15 minutes isnt long enough

I find the oild on the dipstick can fluctuate quite a bit depending on when you take the reading and even not quite flat ground effects it

only reliable way to get an idea is to check the oil after its been standing all night in the driveway where you always park it
ive never had to add oil to a 1hz between 5k services

I've found as the oil gets older that can happen.

My Cruiser will be fine and suddenly use a litre after a 500km run.

Steve

IronJosh

There are a lot of reasons why the engine could use oil.
Firstly the engine may have done a lot of km and it is using oil because of the sad state of the rings.
The oil quality you use is also important, if you are not using a world recognized proven brand, then you may have trouble.

You may have been trickling around town and the oil has suffered some diesel dilution which makes it thinner and when you go for a long hot run the thinned enigine oil will pass the rings and valve stem seals more easily and be burnt off ie lowering the sump level. Little bit often = no visible smoke but uses the oil anyway.
When you say" no smoke", is that with you looking in the mirror to try and see it or is it from a person following you and looking and breathing it the fumes?? May be an entirely different story. You can use a reverse camera to monitor exhaust haze/smoke.

When dipping after stopping a HOT engine the oil, like when you drain it HOT, will run back to the sump very quickly. The engine relies on the fact that it WILL run back quickly, otherwise the oil would be stacking up the top and running out the pcv line under some degree of pressure. You don't have to wait overnight for hot oil to find the sump with gravity assisting it.
An engine drained HOT with filler open will dump all into the drum and after that only a very small amount will drip off.The drip off, being what falls into the sump after switch off.
Hardly significant and nothing like half a litre, 100ml perhaps and that won't be significant on a dip stick with a sump capacity of 10 litres.

You now have to work out :
Is it poor oil quality I use?
Are the rings stuffed/worn?
Have I been towning stop/start for a fair few km?

If the engine doesn't leak oil then it has to be going out the exhaust.

Ross M

Josh,
guess you know your engine well and as said it can be oil dilution that you have burnt off on a big run, checking the oil to early when hot and I have found 15mins way to short a time. Oil also tends to be used when you get close to the 5000k mark. Otherwise it is going out the chimney.

1HZ engines are renowned for going the full 5000k and not using oil at all. Having driven at least 50 different 1HZ engined Tojo's, I found the only time they would start to use oil was when the engine hours were really high. 8000 hours and over. These engines were used in very dusty conditions and they differently would have been dusted at those hours.
You would notice them not engine breaking as well on steep grades and they would be down on power as well. One thing is, they would just keep going and going.

You are not going wrong using delo 400. Good oil used by many commercial operators and farmers.

To be honest I wouldn't consider a turbo on that engine unless it had a birthday. In fact I personally don't like turbos on engines that weren't designed for them, but that is my view. The internals of a Turbo engine an a N/a engine are like chalk and cheese.

RA.

Firstly I think the oil dilution thing is seriolusly over stated.

If you have 500ml of diesel in ya sump you have a very very serious problem...if the engine is not buggered it soon will be.

Lets stop grasping as straws and go back to some basic observations.

Have you checked the oil level throughout the 5000Km oil change period?
Did you check the oil level when the vehicle had been driven the first time after oil change.

Have you checked the oil level at a variety of different times to account for the filter drain back issues as discussed above?

Check level immediately after the engine stops, after 10 minutes ( that should be plenty to drain back the head and such) after a couple of hours and overnight.

The idea that your oil levels are varying to any significant level due to diesel dilution or water content on a perfectly heathy motor in my opinion is little more than a bad dream.

1 liter in 5000Km is not a high consumption for an older motor, if that amount of oil is steadily going past the rings or the valve guides you are unlilkey to see it.

BTW, have you taken it for a good long highway run ( at least 4 hours) with a couple of good range pulls.
Sometimes that will clean the crap out from behind the rings and things will go much better for it.

Stick with the Dello, ya cant go wrong there.

Might be worth checking you PCV system.

cheers

Ironjosh
there is nothing wrong with your 1HZ from what you describe

Despite the mis information some on here have told you I didndt say 15 minutes is no where near enough time for all the oil to drain back for fun which was the basic reason for your post
forget the theory behind oil drainback times - heres the indisputable fact




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iron Josh,

As Ross and Rockape have explained engine oil can suffer fuel and water dilution particularly if the normal work and back or whatever short runs are the general rule. This can happen with petrol or diesel engines. Take them for a good long run and quite often the level in the sump will drop. For an engine like the 1HZ with pre-combustion design and glow plugs they need a little longer to get to an operating temperature where the complete combustion of the injected fuel will burn. I am talking about piston crown, cylinder wall and cylinder head firedeck temps not what your coolant gauge is saying. While the engine is warming up thoroughly some fuel can wash past the piston rings and end up in the sump. When you get home from a run and the car is sitting in the carport and cooling down some air can be drawn back into the crankcase via the breather system. With that air will be a small amount of moisture depending on how much difference there is between the operating temperature when running and how cold it gets at night will determine how much condensation will occur.
Now an engine with a few k's on the clock will probably use some oil depending on it's service history and what conditions it has operated under. While relatively short runs are the norm the genuine usage may be made up for by the addition of some fuel or water so it appears that the engine is not using any oil. Then comes the holidays and maybe a van or trailer full of goodies gets hooked on and a run of a couple of hundred k's working hard gets done. All of a sudden all the fuel and water is evaporated out of the oil and hey the level has dropped.
Check your oil first thing in the morning before starting and again the next morning before starting and compare.

Cheers
Pop

I may know quite well, how and when the oil, will or will not be, in the sump.
Others may not if they aren't familiar with engines.
Hence the query.

As one post said "You have started it after the 8 49"
You knew what you were doing, perhaps not all did.

As it stands the 1Hz must have an upside down filter which has a drain back valve which never works properly and because of the design of the engine copious amounts of other oil remains up near the cam defying gravity, for a long time apparently. There is nowhere else it can be. If filler cap was removed, it should be able to see said oil retention and therefore no degree of intrigue at all.

One thing hasn't been explained is.
With some engines the dipstick seal at the top of the tube is GOOD.
While running oil will retreat from the bottom of the dipstick tube.and the running level in the sump will hardly register on the stick.

When stopped, the oil does not reenter the dipstick tube to the true level of the oil in the sump ( all depends on how long the tube is)and if a once only withdrawing of the dipstick is taken as the reading, it will show low.

However, if it is dipped a second time it will read correctly, as the oil has now run up the tube to the correct level, which is now read at the second dip.

This will happen more so if the dip tube is on the LHS of the engine and the vehicle is leaning slightly to the LHS. Seen it many times.

Maybe someone can answer a simple question for me....... Why is everyone making a big deal about a 320,000K 1HZ using 1lt of oil every 5000k.

There has nearly been 30 posts on this topic with ideas and solutions including a discussion on how long to wait before checking the oil.

Please stop humouring me...... if it was using 3-5 lts evry 5000k then there might be a reason to be concerned.

I didn't know you needed a PHD to check the oil....... come on guys take a look at your replies, how hard can it be to check the oil.... it's pretty idiot proof.

Josh if your concerned I would seriously start thing about a $5000-$10000 engine rebuild for a cure for this BIG problem you have.

Hey has anyone asked what oil and grade he is using...... might have something to do with it!

I might have something to do with the white writing on his tyres being on the inside or outside...... or the moon phase..... might be related to December's end of the world......

It's starting to remind me of 5 men around a BBQ grunting and groaning trying to find a scientific solution to a non scientific problem...... it's using a litre of oil ....BIG DEAL.