Oil consumption increases when car driven fast.

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Old 23 Nov 2004, 05:36 pm   #1 (permalink)
Jager
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Default Oil consumption increases when car driven fast.

I have 2.2L 1996 Camry with 153000m. The car goes well though some power
loss is noticeable.
I noticed that engine oil level reduces if car is driven at speeds higher
than 75mph (for short distances) and I have to add more oil. Is this
normal?


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Old 23 Nov 2004, 06:57 pm   #2 (permalink)
m Ransley
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Default Re: Oil consumption increases when car driven fast.

You CAN be specific, like a 1/4 quart in 3000 or 2 quarts in 1000m, But
I guess we should read your mind , right ... Did you do a compression
test , of course not, you are an )(*&%..

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Old 23 Nov 2004, 08:09 pm   #3 (permalink)
Wolfgang
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Default Re: Oil consumption increases when car driven fast.

Thats normal with that many miles - oil gets hot and oil vapors get sucked
past rings and valves to be burned. Have you ever replaced the PVC valve.
If the $10 PVC valve doesn't help - the alternative is use thicker oil or
rebuild the entire engine.

"Jager" <jagerfield@yahoo.com> wrote in message
news:1b799180480fe9fe507bce8b81a3bce5@localhost.ta lkaboutautos.com...
>I have 2.2L 1996 Camry with 153000m. The car goes well though some power
> loss is noticeable.
> I noticed that engine oil level reduces if car is driven at speeds higher
> than 75mph (for short distances) and I have to add more oil. Is this
> normal?
>
>



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Old 24 Nov 2004, 06:04 am   #4 (permalink)
pheasant
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Default Re: Oil consumption increases when car driven fast.




"Jager" <jagerfield@yahoo.com> wrote in message
news:1b799180480fe9fe507bce8b81a3bce5@localhost.ta lkaboutautos.com...
>I have 2.2L 1996 Camry with 153000m. The car goes well though some power
> loss is noticeable.
> I noticed that engine oil level reduces if car is driven at speeds higher
> than 75mph (for short distances) and I have to add more oil. Is this
> normal?


If the consumption is a quart per 1000-1500 miles that's perfectly normal.
If you start using a quart in less than 1000 miles then something nastier
than ordinary wear might be knocking. In any case, oil is cheap, a rebuild
ain't. Add more and live with it. No big deal.


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Old 24 Nov 2004, 07:34 am   #5 (permalink)
Daniel M. Dreifus
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Default Re: Oil consumption increases when car driven fast.

"Jager" <jagerfield@yahoo.com> wrote in message news:<1b799180480fe9fe507bce8b81a3bce5@localhost.t alkaboutautos.com>...
> I have 2.2L 1996 Camry with 153000m. The car goes well though some power
> loss is noticeable.
> I noticed that engine oil level reduces if car is driven at speeds higher
> than 75mph (for short distances) and I have to add more oil. Is this
> normal?



http://auto-rx.com/
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Old 24 Nov 2004, 09:21 am   #6 (permalink)
MisterSkippy
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Default Re: Oil consumption increases when car driven fast.

On Tue, 23 Nov 2004 18:57:14 -0600, ransley@webtv.net (m Ransley)
wrote:

>You CAN be specific, like a 1/4 quart in 3000 or 2 quarts in 1000m, But
>I guess we should read your mind , right ... Did you do a compression
>test , of course not, you are an )(*&%..


Author killfiled for wasting bandwidth with rude and uncalled for
comments.
Plonk!




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Old 24 Nov 2004, 03:02 pm   #7 (permalink)
Jason James
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Default Re: Oil consumption increases when car driven fast.


"Jager" <jagerfield@yahoo.com> wrote in message
news:1b799180480fe9fe507bce8b81a3bce5@localhost.ta lkaboutautos.com...
> I have 2.2L 1996 Camry with 153000m. The car goes well though some power
> loss is noticeable.
> I noticed that engine oil level reduces if car is driven at speeds higher
> than 75mph (for short distances) and I have to add more oil. Is this
> normal?



As engines become worn, there is increased chances for oil consumption to
rise.

- both compression and oil-control piston- rings act as scrapers to remove
oil which has collected on the cylinder walls,..but not removing it all as
some has to remain to act as lubrication or to stop direct ring to cyl-wall
contact.
As the rings wear and lose their expand-tension, this scraping effect
becomes less effective leaving more oil to be burnt on the power-stroke.

In parallel with ring-wear the ring grooves in the pistons become wider and
along with ring wear which meansthe space behind the rings gets larger in
the piston-grooves, oil-pumping starts to occur. Basically, oil is always
sitting behind the rings in these grooves which aids ring sealing (which
stops compression loss), but once these critical dimensions increase, oil is
more easily sucked up into the combustion chamber on the intake stroke.
This pumping action comes from the rings scraping oil off the cyl-wall, some
of which collects behind the rings and inbetween the rings,..then on the
intake stroke this oil is sucked up into the comb'chamber.

- increased blow-by ( hot combustion gases on the power and exhaust stroke
getting into the sump under pressure))which is caused by worn rings failing
to provide a good seal with the cyl wall. This increase in sump or crankcase
pressure causes the oil-mist whose presnce is normal, to be pushed out into
the PCV system and burnt via the intake.

- during the intake stroke oil can also be sucked into the combustion
chamber via increased clearances in the valve guides and by worn valve seals

- bearing wear can also cause more oil than normal to be sprayed up onto the
cylinder walls as the oil, under pressure escapes from the crankshaft
rod-bearings.

- increased clearance between the piston itself and the cylinder-wall also
contributes to loss of oil control, tho to a lessor extent.

As long as sufficient oil-changes are done on an oil-consuming engine as
more oil pollution occurs due blow-by, then some degree of protection
occurs, but inevitabley all this increased oil-burning leaves behind carbon
which collects in the worn ring-grooves causing eventual ring-sticking and
breakage. In this event the cylinder fails to produce enough compression for
effective combustion, and the engine loses a lot of power. Also, the
combustion chambers get clogged with more carbon. This causes pre-ignition
as the carbon glows thus igniting the fresh charge either before the spark
or in combination with the spark causing detonation (detonation is an uneven
flame-front during ignition of the fuel-air charge).

One final event which often spells the end for an oil-burning engine is
piston failure. The cause is directly due to the rings becoming stuck or
broken,..but still sealing enough to allow some combustion (power-stroke).
Because the rings are allowing a large amount of blow-by, the piston on long
or high-speed trips, becomes overheated by the ultra-hot gases flowing past
it. Once this reaches a critical point, the aluminium literally starts the
first stages of melting and undergoes what reconditioners call a "piston
collapse". The piston still looks like a piston,..but once measured with a
micrometer, it is found to be significantly undersize. In this state the
piston becomes quite noisy with a lot of smoke being generated from the PCV
system.

Personally,..once an engine starts burning more than a quart (litre) per 300
miles or so,..I'd restrict speed to no more than 60 mph.

Jason



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Old 24 Nov 2004, 06:13 pm   #8 (permalink)
Car Guy
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Default Re: Oil consumption increases when car driven fast.

Your suggestion is valid, but last bit of your response was rude and out of
character for you.

"m Ransley" <ransley@webtv.net> wrote in message
news:23375-41A3DC6A-296@storefull-3132.bay.webtv.net...
> You CAN be specific, like a 1/4 quart in 3000 or 2 quarts in 1000m, But
> I guess we should read your mind , right ... Did you do a compression
> test , of course not, you are an )(*&%..
>



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Old 25 Nov 2004, 05:26 am   #9 (permalink)
Geoff
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Default Re: Oil consumption increases when car driven fast.

I agree with Car Guy, this sort of abuse isn't really needed, and as a
newbie I was disappointed to see it in this group.

Geoff

"Car Guy" <ac222@hotmail.com> wrote in message
news:esWdnUwG2tJ7vjjcRVn-sw@rogers.com...
> Your suggestion is valid, but last bit of your response was rude and out
> of character for you.
>
> "m Ransley" <ransley@webtv.net> wrote in message
> news:23375-41A3DC6A-296@storefull-3132.bay.webtv.net...
>> You CAN be specific, like a 1/4 quart in 3000 or 2 quarts in 1000m, But
>> I guess we should read your mind , right ... Did you do a compression
>> test , of course not, you are an )(*&%..
>>

>
>



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Old 25 Nov 2004, 06:19 am   #10 (permalink)
pheasant
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Default Re: Oil consumption increases when car driven fast.

"Jason James" <vellicet@bigpond.com> wrote in message
news:30kb5cF31pevhU1@uni-berlin.de...
> As engines become worn, there is increased chances for oil consumption to
> rise.



> Personally,..once an engine starts burning more than a quart (litre) per
> 300
> miles or so,..I'd restrict speed to no more than 60 mph.
>


Kudos to Jason!!

That was a very concise explanation of oil consumption. More than most (me
included) care to take the time to write, and yet when I see someone take
the time to do such a thorough job, it makes me feel good that Usenet still
functions as intended in most newsgroups. (and a bit guilty that I didn't
take the time and make the effort myself)
Hats off to this fine post. Wish I'd done it.

Thanks Jason!!!!!

Mark


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