HM oil??

[Keith_Stone]

I've got two 2005 Chevy's with around 120k miles. Both are starting to use a little oil between oci's. I've used synthetics since new. I'm adding about a qt of make-up between changes which are around 6.5k-7.5k. There are no leaks, just consumption. Would a HM oil like M1 HM slow consumption? I've used Amsoil, M1, PP, and QSUD in the past. Thanks for any suggestions.

 

[Rolla07]

Try it, you have nothing to lose. Do 2 hm oil intervals and pass on the results to us!

 

[blackman777]

I think the seal conditioners in high mileage oils are a bad thing. I wouldn't use HM except as a last-ditch measure (like how Stop leak is a last-ditch measure for a bad trans or radiator).

When my car drops a quart of oil, I use that as opportunity to flush the whole system (oil change) rather than mix new oil with old.

 

[Clevy]

OP. I am also of the opinion of what can it hurt however if its not leaking it that means its burning it.
Over 7500 miles consuming a quart isn't really really a whole lot.
Have you changed brands of oil. Could it be vaporizing the oil?
Sometimes consumption is due to the ring lands getting coked up.
Personally I'd try to find out why.
But yeah. Give a HM oil a shot. I seriously doubt the gasket swelling,then shrinking with non HM oil and causing a leak fear has any real merit but some folks have active imaginations. I'd love to see some data,or even read an anecdote implying such an event.
I read good things about M1 HM and max life too although I'm sure all the majors have a decent HM offering.
Liqui-moly motor oil saver is great stuff for consumption. It's an ester and contains boron which improves tbn. Its cheap and you can still use whatever oil you like. If you've got the typical bitog stockpile the last thing you need is to buy more oil so if that's your situation an additive makes sense.
Liqui-moly mos2 has been known to stop consumption as well. The plating effect could be just what you need.
I'd love to see the cylinders compression tested then add mos2 and re-test. Results from that would be interesting to say the least

 

[volk06]

Originally Posted By: blackman777
I think the seal conditioners in high mileage oils are a bad thing. I wouldn't use HM except as a last-ditch measure (like how Stop leak is a last-ditch measure for a bad trans or radiator).

When my car drops a quart of oil, I use that as opportunity to flush the whole system (oil change) rather than mix new oil with old.


Why?

 

[bvance554]

I would consider 1 qt in 6.5-7.5k completely reasonable and acceptable. I don't really have an opinion on HM oil ine way or the other, but i don't see an issue or need to change from what you're currently using.

 

[Richtrashman]

Why don't you try a regular old Dino oil in the same flavor and see if that stops it? Anyway if consumption is your worry just use Dino and do a 5-7k oci? Just a thought

 

[blackman777]

All carmakers says 1 quart consumption is accepted (or even expected).

 

[TFB1]

You guys need to read and think... He said he's adding a quart of make up oil in 6500-7500 miles, that surely doesn't mean he's adding it then opening the plug to drain it... More likely he's using a quart at 3.5 to 4K mi(that I wouldn't give a second thought about)...

If the oil is being drawn by the valve stem seals the HM may help, otherwise probably not...

 

[bvance554]

Originally Posted By: TFB1
You guys need to read and think... He said he's adding a quart of make up oil in 6500-7500 miles, that surely doesn't mean he's adding it then opening the plug to drain it... More likely he's using a quart at 3.5 to 4K mi(that I wouldn't give a second thought about)...

If the oil is being drawn by the valve stem seals the HM may help, otherwise probably not...


I've thought about it... And i'm not sure what you're point is. His engine is consuming a very small amount of oil.

 

[Ayrton]

Originally Posted By: Keith_Stone
I've got two 2005 Chevy's with around 120k miles. Both are starting to use a little oil between oci's. I've used synthetics since new. I'm adding about a qt of make-upM between changes which are around 6.5k-7.5k. There are no leaks, just consumption. Would a HM oil like M1 HM slow consumption? I've used Amsoil, M1, PP, and QSUD in the past. Thanks for any suggestions.



I'd say try it in one of the trucks and see what you think. Some have shown it can help, others do not, probably depends on the reason/kind of consumption.

M1 HM is a very high quality product with a strong additive package.

 

[nleksan]

I have seen brand new cars burn as much oil, I mean we're talking about the difference a proper vs improper break in period can make. With that high of mileage, I'd say you are doing darn good.

I am FAR from an expert on Chevy motors, but most oil consumption I see comes from coked up rings or from sludged lines/passages/head.

If it were me, and my motor/money, I'd run a few short OCI's of an oil that's extremelyggood at cleaning up sludge and the like, personally that'd be Redline or RP, and inspect visually every 1k. Change the filter 2x per OCI, starting with 3-4k OCI and increasing by 1k until you are back to normal. I have seen that while doing this, consumption INCREASES above where it was, but it then stops and by the time you're done your engine is consuming, at most, less than half of what it was before (and running very noticeably better, economy may be improved, emissions are almost always improved, fuel dilution becomes particulate count plummets).

Of course, I have also used Seafoam with good results, but I would be extremely hesitant to use it on that mileage of a motor as a first line treatment. Redline in the crank + SI-1 in the tank, has always been good to me.