Car starts using oil deep into a run

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So I'm at 5400 miles and my car in the last 800 miles or so has used a about 1/3rd of a quart I'm not concerned I do slot of highway 80- 85mph (flow of traffic usually) 800 miles ago it was full and now it's not. Not concerned at all its normal but would you look at it as a sign to change it because of shearing? The olm is as 35% . Opinions anyone.
 
Have had a couple of vehicles that did that towards the end of an OCI. Usually added a quart and went to the end which was within a couple thousand miles.

The question is: how does your UOA look at the point at which it happens?
 
Mine does the same thing within a few hundred miles of yours on 0w20.
I'm at 6000mi on this fill right now and haven't had any issues,
and roughly 300 mi of that is race line stuff.
 
on my malibu i did its first o/c about 4.1k and it consumed about 1/4 a quart of oil with 37% oil life left. With PP 0w20 with about 7.5k on her now with 40% oil life left it hasn't consumed a drop .
 
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Originally Posted By: GumbyJarvis
Mine does the same thing within a few hundred miles of yours on 0w20.
I'm at 6000mi on this fill right now and haven't had any issues,
and roughly 300 mi of that is race line stuff.


Did the 0w40 make a difference in yours?
 
Don't turn into GHT and start "fixing it to death". First establish whether this is a legitimate trend and subsequently something you might call a problem. Then you can start fooling around and finding what consumes and what doesn't. My Expedition swills Amsoil AZO 0w30 like it's on tap (4L in a 10K OCI) but will require no top ups between changes on M1 AFE 0w-30. Same grade, similar characteristics, massively different results.
 
I belie I clearly said I wasn't concerned and it wasn't a problem merely I was making the case that considering the drive and conditions it's subject to maybe changing it before 7500 and closer to 5,000 is a decent idea? I In no way think there's an issue it's completely normal. I just thought it showed the oil probably sheared some and would explain the usage at around 5,000 miles.
 
Originally Posted By: AZjeff
Don't you need more than 1 OCI to see a trend? Especially when it's the 1st OCI? One sure way to know if the oil is shearing down...

or, see my sig below and carry on..


It's not the first oil change either. Lol the oil was changed at 4300 miles
 
Originally Posted By: ram_man
I belie I clearly said I wasn't concerned and it wasn't a problem merely I was making the case that considering the drive and conditions it's subject to maybe changing it before 7500 and closer to 5,000 is a decent idea? I In no way think there's an issue it's completely normal. I just thought it showed the oil probably sheared some and would explain the usage at around 5,000 miles.


Or maybe it didn't. You could do a UOA and find out, but your engine is still breaking in right? If so, varying levels of consumption may be perfectly normal. I'd run the OLM and see if the same thing happens next time.
 
Originally Posted By: OVERKILL
Originally Posted By: ram_man
I belie I clearly said I wasn't concerned and it wasn't a problem merely I was making the case that considering the drive and conditions it's subject to maybe changing it before 7500 and closer to 5,000 is a decent idea? I In no way think there's an issue it's completely normal. I just thought it showed the oil probably sheared some and would explain the usage at around 5,000 miles.


Or maybe it didn't. You could do a UOA and find out, but your engine is still breaking in right? If so, varying levels of consumption may be perfectly normal. I'd run the OLM and see if the same thing happens next time.


It's got almost 10,000 miles on it do you think it's still breaking in?
 
Originally Posted By: OVERKILL
Don't turn into GHT and start "fixing it to death".
Don't turn into?
crackmeup2.gif
 
Originally Posted By: ram_man
Originally Posted By: OVERKILL
Originally Posted By: ram_man
I belie I clearly said I wasn't concerned and it wasn't a problem merely I was making the case that considering the drive and conditions it's subject to maybe changing it before 7500 and closer to 5,000 is a decent idea? I In no way think there's an issue it's completely normal. I just thought it showed the oil probably sheared some and would explain the usage at around 5,000 miles.


Or maybe it didn't. You could do a UOA and find out, but your engine is still breaking in right? If so, varying levels of consumption may be perfectly normal. I'd run the OLM and see if the same thing happens next time.


It's got almost 10,000 miles on it do you think it's still breaking in?


I'm sure parts of it still are, yeah. This is what, the 2nd OCI since new? Check the filter when you change it, if you still find break in metal, that answers your question
wink.gif
There was a fair bit that came out of my 6.4L on the 1st OCI and I'm sure I'll find some more the 2nd time around.
 
I suppose I could cut it open it was the third oil change though. First at 500 then at 4300 so second by me but it's the 3rd fill in its life.
 
Originally Posted By: ram_man
I belie I clearly said I wasn't concerned and it wasn't a problem merely I was making the case that considering the drive and conditions it's subject to maybe changing it before 7500 and closer to 5,000 is a decent idea?

If you keep observing the same symptoms, then that might be a sensible plan. Longer OCIs can make great financial sense, but other times, you have issues like this that are problematic. The old LTD would be good with consumption for a short while, and then go really bad after a certain point. The taxis that required top up were the same, too. You get to a point in an OCI where you just have to start and continue adding.
 
I had a couple of beaters that did just that over the years, it was very predictable. I just topped them up and changed the oil when it was due to be changed.
 
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