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Topic Review (Newest First)
04-05-2013 06:40 PM
gillbot
Quote:
Originally Posted by dieselgiant View Post
Did you do an oil analysis and saw imperical data that the synthetic oil was "done" at 3500 miles? Just looking at it wont cut it a lab analysis is the ONLY way to tell if its done. I know of NO situation where conventional oil out performs synthic except in 2 areas. 1) Initial cost at install is cheaper, 2) wear rates over time are higher.
You missed the fact that I was talking about two different vehicles.

On my car, which I raced very often, lab analysis shows severe breakdown after only about 3500 miles or about 1/2 a season of racing.

My truck, which is basically a highway driven street vehicle, only got conventional and it would easily last 7500 miles.

Not once did I ever mention conventional oil would outlast a synthetic. Yes, I do oil analysis on ALL of my oil in ALL of my vehicles.
Quote:
Originally Posted by Ogandactavis View Post
Is mobil 1 oil any good?
Depends on the weight. From my testing, the oil itself is pretty good but the weights seem to be on the lower side of the scale for my taste.
Quote:
Originally Posted by HOOCBB View Post
IMHO, the filter has more to do with the time between oil changes than the oil itself.
Yes, often people over look the filter. The oil may last 10k, but can the filter? I change my filter at 3000-5000 independent of the oil. Store clerks look at me odd when I go in to buy supplies for oil changes. I buy a case of filters and one jug of oil!
04-04-2013 12:11 PM
jklarry just a note; there is NO manufacturer that sends their products out with BREAK-IN oil! the chance of some one NOT changing their oil ups the liability issue too high. there are several car manufacturers who send their products out with synthetics and high mileage recommendations. some of AMSOIL has some with 25K or one year intervals, MOBIL 1 has some with 15K or one year intervals, notice the ONE YEAR part.
I have used AMSOIL since 1974, Wife DEMANDS it in her cars/jeeps. I usually go the one year intervals, never a problem.
04-04-2013 11:20 AM
Sasquatchewan I will bet that Jeep just didn't want to add extra costs by running with full synt. They want it to also be affordable for all . My 2004 Excursion came with a compromise it ran synthetic blend 0W20 says change every 7500 mi
04-04-2013 10:35 AM
HOOCBB IMHO, the filter has more to do with the time between oil changes than the oil itself.

I have yet to change the oil in my Jeep, but I was changing it in my Mustangs at 6k miles. That was mostly due to the filters and running in dusty environments. If you use the cheapy filters like Fram and the Autozone house brand, I wouldn't go much past 3k due to the paper element. I don't even want to get into the drainback valve construction in these (made of cardboard in many cases).

I switched to Wix filters (may still not be the best, but far better than the cheapies) when I switched to full synthetic Mobil 1. I see a lot of people singing the praises of Amsoil, but always wonder if it is REALLY that good. I don't know anyone personally that has used it. I run Royal Purple in my diffs (need to change to it in the Jeep soon) and transmissions, but haven't used it in the engine yet. I may switch to it on my first oil change.
04-04-2013 09:12 AM
1quick1
Quote:
Originally Posted by Sasquatchewan View Post
Yeah my Porsche I used to own had Mobil 1 from the factory the factory recommends oil change at 15,000 mi w/ the filter every other time now that's a 9 quart flat 6 ! The new ones go every 20,000 mi
My 02 Vette had Mobile 1 from the dealer and had the same recommendations. It was 15k or 1 year whatever came first.

No reason at all to change your synthetic earlier than that. No reason to change your Jeep oil anything earlier than the dealer/manual says 8k or 6 months.
04-03-2013 08:41 PM
tomthbomb O.P. here.

Went back to the quick/fast/jiff/whatever Lube today and ask for the Penzzoil 5w-20 full syn again. Owner said they never had it. I told him they did last time I was there, he said no. So, I left without changing it.

Got back home, looked at the receipt for last time. It was Penzzoil 5w-30. Shows how much attention I paid but I took him at his word.

That could account for why the little ticking sound I would hear when I get out to unlock my gate was completely gone?

Hmmmm?
04-03-2013 06:15 PM
jkjeeper06
Quote:
Originally Posted by overblown

Just wanted to point out something about this. Porsche is just one of several manufacturers of high performance vehicles that use synthetic oil right from the factory. Point? The whole, "don't use synthetic too early" thing is just another incorrect myth that needs to be busted.
I agree with you that it's never too early to change. I'd just wait because I'd like to do the break in first then drain all the metal shavings then do the good stuff

A big reason those auto makers are switching to synthetic is that many of their owners, including my parents, would rather go 15k(recommended by manufacturer) on an oil change than the traditional 3-6k
04-03-2013 05:22 PM
dieselgiant
Quote:
Originally Posted by overblown View Post






Just wanted to point out something about this. Porsche is just one of several manufacturers of high performance vehicles that use synthetic oil right from the factory. Point? The whole, "don't use synthetic too early" thing is just another incorrect myth that needs to be busted.

The engines in these high performance cars see far more stress and are making far more power than our Jeeps and they start from the very beginning with synthetic.

So if you choose to run syn in your Jeep, there's no need to wait a certain amount of time or miles before you do so.

Just because Porche and Corvettes use synthetic does NOT mean that is fine for the 3.6 as brand new. You are missing one important point. Those engines are probably machined or finished to a different tolerance and certainly use different alloys being "high performance" than our 3.6. Evidently the 3.6 needs the break-in oil which helps the parts wear in faster that those with synthetic from the factory do not. After a proper break-in the 3.6 is just fine to run synthetic. As much as people want to take care of their engines, I would NOT dump the break-in oil before its time for a regular oil change interval. I am sure the engineers have worked out exactly what the oil properties and charastics need to be in order for your engine to live a long and healthy life.
04-03-2013 01:17 PM
overblown
Quote:
Originally Posted by xjcj5jku View Post
So good to see the 3K oil change craze be debunked here! Yay for liberation. It is such a scam that is soooo outdated and unsupported. My current compromise on new JKUR is synthetics (in our heat they recommended 5W-40) and 8K changes to hedge the warranty issue...



Quote:
Originally Posted by Sasquatchewan View Post
Yeah my Porsche I used to own had Mobil 1 from the factory the factory recommends oil change at 15,000 mi w/ the filter every other time now that's a 9 quart flat 6 ! The new ones go every 20,000 mi

Just wanted to point out something about this. Porsche is just one of several manufacturers of high performance vehicles that use synthetic oil right from the factory. Point? The whole, "don't use synthetic too early" thing is just another incorrect myth that needs to be busted.

The engines in these high performance cars see far more stress and are making far more power than our Jeeps and they start from the very beginning with synthetic.

So if you choose to run syn in your Jeep, there's no need to wait a certain amount of time or miles before you do so.
04-03-2013 10:44 AM
Sasquatchewan Yeah my Porsche I used to own had Mobil 1 from the factory the factory recommends oil change at 15,000 mi w/ the filter every other time now that's a 9 quart flat 6 ! The new ones go every 20,000 mi
04-03-2013 09:56 AM
HK_Runner Really depends on your driving but 3,000 would be for extreme severe service (like a NY cab) and that is not something we do. With a good synthetic, you can easily go 5,000. Some syns are made for long intervals (Amsoil Signature, Mobil 1 EP) but with your Pennzoil, I would go 5K-8K, depending on your off-roading, short trips, etc.

My dealer says 6K-8K, depending on use. Your current use would lead me to a ~7,500 change. Highway driving is the easiest on oil. 3,000 is just irresponsibly wasteful, even with regular/dino oil. With a good dino like Pennzoil Yellow Bottle, I would go 4,500-5,000.
04-03-2013 09:30 AM
xjcj5jku So good to see the 3K oil change craze be debunked here! Yay for liberation. It is such a scam that is soooo outdated and unsupported. My current compromise on new JKUR is synthetics (in our heat they recommended 5W-40) and 8K changes to hedge the warranty issue...
04-03-2013 08:49 AM
Mody n Domy All the vehicles I have owned in the past I have run Amsoil and use there filter if they make one. If I cant find the Amsoil filter I will use the NAPA gold filter and change the filter every 5,000 miles and the oil every 10,000. I have never had a oil related problem with any vehicle I have had and have been dong this for 17 years.
04-02-2013 11:51 PM
socal-jk
Quote:
Originally Posted by Ogandactavis View Post
Is mobil 1 oil any good?
Factory fill for porsche so a jeep should be fine. Castrol is good too.
04-02-2013 10:19 PM
Ogandactavis Is mobil 1 oil any good?
04-02-2013 09:09 PM
dieselgiant When I change my Jetta Tdi oil it gets soot black within 5 minutes of running the engine after the oil change. That is just the way it is, hurts nothing.
04-02-2013 06:41 PM
overblown
Quote:
Originally Posted by dieselgiant View Post
Did you do an oil analysis and saw imperical data that the synthetic oil was "done" at 3500 miles? Just looking at it wont cut it a lab analysis is the ONLY way to tell if its done. I know of NO situation where conventional oil out performs synthic except in 2 areas. 1) Initial cost at install is cheaper, 2) wear rates over time are higher.
Good points. Its a very common misconception that dark oil is bad oil. The truth is, the oil doesn't take very long to darken. Minus obvious signs such as foreign objects, foreign fluids(anitifreeze, fuel etc) it isn't really possible to eyeball whether or not oil is still good. A test is the only true way. Once you establish a baseline after two tests or so, you can safely reset your pre-concieved notions on engine oil, save yourself lots of cash, prevent wasting more oil than necessary all while your engine stays well protected.

Oil tests can also alert you to problems you otherwise would have had no way of knowing about until it was too late!
04-02-2013 06:08 PM
dieselgiant
Quote:
Originally Posted by gillbot View Post
That would really depend on the environment he's using the vehicle in. On my car, the oil (pure synthetic) would degrade after only 3500-4000 miles, but it was abused repeatedly in very dusty/dirty air. On my truck, I can get 7500 on conventional oil so a decent synthetic should theoretically last 10k, bu i'd never base my oil changes solely on mileage without testing it first to determine the proper interval.
Did you do an oil analysis and saw imperical data that the synthetic oil was "done" at 3500 miles? Just looking at it wont cut it a lab analysis is the ONLY way to tell if its done. I know of NO situation where conventional oil out performs synthic except in 2 areas. 1) Initial cost at install is cheaper, 2) wear rates over time are higher.
04-02-2013 05:23 PM
1quick1
Quote:
Originally Posted by tomthbomb View Post
How many miles do you run between synthetic oil changes?

I use Pennnzoil 5w-20 full synthetic in my 2012. My oil change tech says 5k is OK. I am at 5.5k. Need I run out right now to change it?

90% of my mileage is on the highway at between 50mph & 70mph. This is my first time to use full synthetic. My mileage is at 34.5k right now.
I don't even change my regular oil that much. Synthetic I'd go a year or 10-12k whatever came first.

I do 8k or 6 months whatever comes first with stock oil, with the exception of the one I'm getting Thursday at 4 months and 4,000 miles since it's my first one.
04-02-2013 05:15 PM
tomthbomb If a Jeep had an hour meter (mine does) how many hours would be appropriate before the oil change?
04-02-2013 05:09 PM
overblown
Quote:
Originally Posted by bvanfossen View Post
When you have your oil analyzed, do they tell you a timeframe when it will need to be changed?
Yes, you do get a recommendation on how much longer you can run the oil. It's $25 people. Do it once and you'll be shocked at the results(assuming your engine is in proper working order) then do it again if you'd like just to reassure yourself. Once you see the truth about modern oil and engines, the testing will more than pay for itself.

This is the company I use. http://www.blackstone-labs.com/
04-02-2013 05:05 PM
bvanfossen When you have your oil analyzed, do they tell you a timeframe when it will need to be changed?
04-02-2013 03:42 PM
overblown
Quote:
Originally Posted by dieselgiant View Post
Yes the 3k oil changes are waaaaayyyyyy outdated. The new conventional oils are far better than the oil 1960's oil. With that being said doing an oil analysis is really the ONLY sure way to know if its time to change or not. If you like 3k oil changes fine, take a sample and send it to a reputable firm to have it analyzed. I think you will be surprised. Even though synthetics like Amsoil can go on and on, I think you would have a very hard time with a warranty claim if you show 10k or greater oil changes. Even though you may have oil analysis that shows the oil is fine at that interval, they will probably say your not following the maintenance schedule. I use to run 30k oil changes in my Jetta tdi and hav e done tons of oil analysis showing the oil was still good even at that interval. When Amsoil stopped making a filter for my car I went to 10k changes. I have 340,000 miles on my car and the engine is still running great and hospital clean inside. I run a bypass filter system on my Dodge Cumming and do NOT change the oil. Just filters and do oil analysis, oil is still in perfect shape.

Hours on an engine is really the best way to do oil change intervals, not miles. So the Jeeps should have hour meters as an option on the info display.
Why did you have to hit'em with the heavy stuff so fast You literally just gave several guys heart attacks

I highly recommend to anyone to have their oil analyzed at least a few times just so you can see for yourselves where your hard earned money is really going. I can pretty much guarantee you'll be amazed at how much you are wasting. Not to mention the oil you're wasting for no reason at all. It's time to come around to the new reality guys. Get out of the past and let today's technology work for you.

This oil myth is something that is long past due to be put to pasture.
04-02-2013 03:34 PM
overblown
Quote:
Originally Posted by gillbot View Post
That would really depend on the environment he's using the vehicle in. On my car, the oil (pure synthetic) would degrade after only 3500-4000 miles, but it was abused repeatedly in very dusty/dirty air. On my truck, I can get 7500 on conventional oil so a decent synthetic should theoretically last 10k, bu i'd never base my oil changes solely on mileage without testing it first to determine the proper interval.
Of course, and he clearly stated that 90% of his time is highway driving at 50-70mph. A far cry from being repeatedly abused in very dusty/dirty air I'd say.
04-02-2013 03:05 PM
gillbot
Quote:
Originally Posted by overblown View Post
Are you ready for this? Might want to sit down first and have a glass of water ready along with some smelling salts.










You've got another 4.5k to go before a change.
That would really depend on the environment he's using the vehicle in. On my car, the oil (pure synthetic) would degrade after only 3500-4000 miles, but it was abused repeatedly in very dusty/dirty air. On my truck, I can get 7500 on conventional oil so a decent synthetic should theoretically last 10k, bu i'd never base my oil changes solely on mileage without testing it first to determine the proper interval.
04-02-2013 03:05 PM
dieselgiant Yes the 3k oil changes are waaaaayyyyyy outdated. The new conventional oils are far better than the oil 1960's oil. With that being said doing an oil analysis is really the ONLY sure way to know if its time to change or not. If you like 3k oil changes fine, take a sample and send it to a reputable firm to have it analyzed. I think you will be surprised. Even though synthetics like Amsoil can go on and on, I think you would have a very hard time with a warranty claim if you show 10k or greater oil changes. Even though you may have oil analysis that shows the oil is fine at that interval, they will probably say your not following the maintenance schedule. I use to run 30k oil changes in my Jetta tdi and hav e done tons of oil analysis showing the oil was still good even at that interval. When Amsoil stopped making a filter for my car I went to 10k changes. I have 340,000 miles on my car and the engine is still running great and hospital clean inside. I run a bypass filter system on my Dodge Cumming and do NOT change the oil. Just filters and do oil analysis, oil is still in perfect shape.

Hours on an engine is really the best way to do oil change intervals, not miles. So the Jeeps should have hour meters as an option on the info display.
04-02-2013 02:40 PM
overblown
Quote:
Originally Posted by Jeep sauce View Post
I think the 3,000/3month rule is dated. I am comfortable with 5000miles/5months.
Have you ever stopped to think about where the 3000 mile rule even came from? Manufacturers recommendations from decades ago. Stayed that way for years. It worked and was expected. The funny thing is, now that manufacturers are recommending oil changes at 8k, 10k, 15k etc, people all of a sudden aren't willing to listen? If it was acceptable back then, why not now? I'll tell you why.

People don't like change.
04-02-2013 02:28 PM
overblown
Quote:
Originally Posted by Greg_2012_JKU View Post
I would NEVER go 10,000 miles between oil changes!! Doesn't the owners manual say to not go over 8,000 miles? And you are telling him he can go 10,000??
What are you afraid of? Please tell me what personal experience you have had that tells you 10,000 mile oil changes are harmful to an engine. If no personal experience, do you at least know of anyone else who've damaged their engines by doing 10,000 mile oil changes with synthetic oil? Have you actually thought about that? You are basing your fear off of what you've been taught your whole life. Practices that are outdated yet won't die. Very understandable. At least just take a moment to consider what I asked.

The factory assumes conventional oil. He is running synthetic.

I've owned my corvette since new. It's been making over 500 hp for years. Always have run mobil 1 synthetic and always 10,000 mile oil changes. Mostly highway miles with a few track days each year as well. Tore it down last year to swap out to a different cam, also pulled the heads just to see and everythings perfect. Have had the oil anaylized twice, great results all within normal levels.

Same thing with my Camaro, exactly the same with my mustang. All running perfectly fine and oil analysis checks out. So much so that I won't be doing any more of those until the miles get substantially higher.

My Land Rover, you really might want to sit down for this one...........goes 15,000 miles between oil changes! And that is per manufacturer not me. It's only had one so far as it's still new but guess what? Zero issues. Runs amazing. All 375hp still charging hard as ever.

So yes, I'm telling him he has another 4500 miles left on that oil before he changes it which will put him at 10k.
04-02-2013 02:14 PM
Jeep sauce I think the 3,000/3month rule is dated. I am comfortable with 5000miles/5months.
04-02-2013 02:10 PM
Greg_2012_JKU
Quote:
Originally Posted by overblown View Post
Are you ready for this? Might want to sit down first and have a glass of water ready along with some smelling salts.










You've got another 4.5k to go before a change.
I would NEVER go 10,000 miles between oil changes!! Doesn't the owners manual say to not go over 8,000 miles? And you are telling him he can go 10,000??
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