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How many miles?

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5K views 33 replies 18 participants last post by  gillbot 
#1 ·
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.
 
#2 ·
I run Royal Purple in mine and I change it out every 5000 miles. Granted there are times that I may go a few hundred miles over but not by much. I've never gone over 6000 miles in any of the 3 cars that I have, and I run Royal Purple in all of them.

If it was mine, I would change it.
 
#4 ·
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.
 
#8 ·
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?:rofl: If it was acceptable back then, why not now? I'll tell you why.

People don't like change. :thumb::thumb:
 
#9 ·
Yes the 3k oil changes are waaaaayyyyyy outdated.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.
 
#12 ·
Why did you have to hit'em with the heavy stuff so fast :rofl: You literally just gave several guys heart attacks :rofl:

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.
 
#14 ·
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/
 
#16 ·
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.
 
#21 ·
Factory fill for porsche so a jeep should be fine. Castrol is good too.
 
#22 ·
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.
 
#23 ·
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...
 
#26 ·
:dance::dance::dance:


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.
 
#24 ·
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.
 
#25 ·
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
 
#30 ·
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.
 
#28 · (Edited)
overblown said:
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
 
#29 ·
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?
 
#31 ·
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.
 
#32 ·
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
 
#33 ·
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.:thumb:
 
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