Can you change to synthetic with over 100k miles?

[J-Thompson]

So.....
We found 1 car mfg. That on their higher end models
has a system that uses a basic conductivity test but on the lower
end uses milage like GM and others
But we have yet to find a car that measures viscosity thus there
is no car on the market that knows when the oil is bad
as to the other systems they still can not measure how dirty
the oil is ,thus they too are point less
Even the high end Merc. system can not measure dirty or broke down
oil only how much metal us in it ,conductivity

Again prove it really "TEST" the oil and you have some thing

 

[J-Thompson]

My proof that you need to change your oil based on miles
and this is how these systems work
#1 open your glove box
read that book in there unless it says "change oil when
dash light says to" you need to change based on miles driven
#2 if you have to push a "reset button"
How can it know the condition of the oil if you have to tell
it the oil is clean?
From what is being said the car knows that the oil is good or bad
so you should not have to tell it ,it knows.......

 

[Banditsteve]

To be honest I can't even be arsed to read this myself but I am sure this will keep you entertained for hours..............
Or you could just change the oil............
More importantly is the earth really round? Or is it just a big conspiracy?
And when you have proved that, you might want to consider this one that has kept me entertained for ages -
"If a person is born deaf, what language do they think in"?

Happy reading,

Steve :smokin:



http://www.machinerylubrication.com/Read/562/oil-change-filter-sensors

 

[jnaut]

Since the 3.7L has historically been relatively leak free, and with Chrysler engineers putting a lot of time into making it, and all of their future engines that way (The 4.7/3.7L were the first engines Chrysler has made that don't leak like a faucet), I'd say you will have no issues at all.

And Bravo to Chrysler for that. Every American car I've ever owned leaked like a sieve. I've been very happy to report that at 94000 miles, my KJ hasn't leaked a drop of oil.

Now, as far as power steering hoses... that's another subject.

 

[04Liberty]

Haven't had a leak out of the KJ since we got it. The only thing on the Ram that ever leaked on me was the rack and pinion (fittings got loose after 60,000 or so miles) and the master cylinder (my own fault when replacing the brakes). Not a drop from the hemi.

 

[JeepJeepster]

Ahh, the wonders of an oil thread. Always brings out the best in everyone(Well worst usually).

And about the 3.7 not leaking oil. My 3.7 is leaking oil in the exact same places one of our 4.0's is except it started doing it much earlier. Pinion seals, tcase output, engine main seals, power steering hoses.. You name it, my kj is leaking it. And its guaranteed the bottom of my kj is cleaner than most people are on this forum.

 

[04Liberty]

Ahh, the wonders of an oil thread. Always brings out the best in everyone(Well worst usually).

Oil and fuel octane (for gas engines).

 

[Banditsteve]

Ahh, the wonders of an oil thread. Always brings out the best in everyone(Well worst usually).

And about the 3.7 not leaking oil. My 3.7 is leaking oil in the exact same places one of our 4.0's is except it started doing it much earlier. Pinion seals, tcase output, engine main seals, power steering hoses.. You name it, my kj is leaking it. And its guaranteed the bottom of my kj is cleaner than most people are on this forum.

Think of it as a built in rust inhibitor system.............. :smokin:

 

[waywardtravel]

Viscosity is not why you change oil. I was chief engineer on a boat that went "in miles" around and around and around the world and probably 6 more times without an oil change. We cleaned and modified the oil based on returned oil samples. The engine did weigh 69tons though, had a blower about the physical size as my KJ. We would pay really close attention to it. I believe an accelerometer would give you a better indicator on oil quality than an electric conductivity test. Nonetheless innovation in the auto industry
I change my KJ oil every 3-4 thousand miles because it works.

 

[04Liberty]

Viscosity is not why you change oil. I was chief engineer on a boat that went "in miles" around and around and around the world and probably 6 more times without an oil change. We cleaned and modified the oil based on returned oil samples. The engine did weigh 69tons though, had a blower about the physical size as my KJ. We would pay really close attention to it. I believe an accelerometer would give you a better indicator on oil quality than an electric conductivity test. Nonetheless innovation in the auto industry
I change my KJ oil every 3-4 thousand miles because it works.

ALCO or Fairbanks? I'm guessing you also had an LOP for it as well?

 

[waywardtravel]

ALCO or Fairbanks? I'm guessing you also had an LOP for it as well?

That one Polar Nohab, direct reversible (no gear) 2,500gal oil sump (KEEL), 800gal cleaning tank, 3gph L.O. centrifuge + 8 roughly 42"x12" 10micron filters. I actually ripped that engine out and installed a Cat 3516B for noise.
Do you mean Lube oil Pump? If so many plumbed in.

Had a few fairbanks but ours much smaller.

My real point was/is "oil" doesn't break down. That's why it's renewable. After centrifuged the "base oil" maintains the exact molecular structure as the day it was formulated. It's only real job is to reduce heat "lubricate" and introduce corrosion resistance. Suspend the crap and try not to create too much acid in the process. I am bad with chemistry but O.K. with this part.

 

[J-Thompson]

yeah but they still dont have the room for that on a car ,well most cars

also I bet it never seen 5K rpm ,or more?
my point was/is there is a reason why you change the oil in any/every thing
some more often than others but I am still sticking to
you change you oil based on miles or in some cases hours ,generators and cranes
stuff that does not move very far

 

[tjkj2002]

Ahh, the wonders of an oil thread. Always brings out the best in everyone(Well worst usually).

And about the 3.7 not leaking oil. My 3.7 is leaking oil in the exact same places one of our 4.0's is except it started doing it much earlier. Pinion seals, tcase output, engine main seals, power steering hoses.. You name it, my kj is leaking it. And its guaranteed the bottom of my kj is cleaner than most people are on this forum.

Take better care of it and it wouldn't leak.In your case lack of use is the cause of your leaks.

 

[J-Thompson]

Take better care of it and it wouldn't leak.In your case lack of use is the cause of your leaks.

nah
I think a leaking engine is hit or miss in all cases
my 4.0 has 50K on it of which 20+ have been hard and those 20K
have taken 6+ years
I change the oil once a year or 3K miles
I let it sit for weeks on end
some times I may go months with out even hosing the mud off from the last trip out ,case and point now been muddy for 2 months
but I have no "leaks" I do have a wet spot but not what I would call a leak
now the guy at work with the XJ and a 4.0 with 105K+ has a leak
it leaves a daily spot in the parking lot ,about a quart every 3K
that is a leak

 

[Marlon_JB2]

My sister's '05 isn't leaking anything at all. 79000 miles. Bone dry. Nothing. Zip.

 

[JeepJeepster]

Think of it as a built in rust inhibitor system.............. :smokin:

Thats the way Im looking at it. There isnt a drop of rust under our ZJ.