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Old 06-06-2014, 09:57 AM   #61
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Would anyone change their minds that synthetic was the next best thing to sliced bread if they learned that some items actually run significantly cooler when lubed with a conventional lubricant than with a synthetic?
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Old 06-06-2014, 10:14 AM   #62
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Would anyone change their minds that synthetic was the next best thing to sliced bread if they learned that some items actually run significantly cooler when lubed with a conventional lubricant than with a synthetic?
Who eats sliced bread? Yuck lol jk
I'm not so much worried about temperature as I am about how clean it gets and keeps the engine. I know that in the past my jeep has not always been taken very good care of. When I got the jeep (from my own parents none the less) and changed the oil for the first time there was a significant amount of sludiness to the ink black oil. Poor Jeepie

Edit: this was a while ago and everything has been running pretty smoothly since but after that first change I've been worried about what the inside of this engine might look like

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Old 06-06-2014, 07:18 PM   #63
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Just bought 5 qts of M1 synthetic. Do I need a synthetic filter too ? I got a purolator. Will that be ok ?
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Old 06-06-2014, 07:28 PM   #64
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The filter can't tell the difference between synthetic and conventional oil. The Purolator PureOne oil filter will be fine.

Folks, there is not a significant difference between synthetic and conventional lubricants, it's not like they aren't essentially the same thing.
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Old 06-06-2014, 09:43 PM   #65
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Correct me if I am wrong, but I've always heard that the type of driving one does has a lot to do with engine longevity. Vehicles that get up to full operating temp and stay there for a while tend to last longer than ones that cover short distances, idle a lot in traffic, etc. In the second scenario synthetic oil and frequent changes might be more of a necessity.
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Old 06-07-2014, 06:33 AM   #66
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Originally Posted by Jerry Bransford View Post
The filter can't tell the difference between synthetic and conventional oil. The Purolator PureOne oil filter will be fine.

Folks, there is not a significant difference between synthetic and conventional lubricants, it's not like they aren't essentially the same thing.
Hey Jerry I heard some bad news about Purolater Filters but not sure which ones. Something about how the filter material deteriorates or something. I can't remember exactly but was recent. You know anything about it? I always ran Purolator Classic filters until I read the news about them not being as great as they used to be. I know it's a little off topic but....
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Old 06-07-2014, 07:39 AM   #67
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The main reason I don't use Mobil One is because I only put 2,000 miles/year on my TJ, meaning one oil change per year....I'd be wasting a lot of money dumping Mobil One out of the engine after only 2,000 miles.

Besides, the 4.0L engine is so well designed and manufactured, and is so under-stressed compared to the more high performance engine types (say for example Chevy's LS6 engine or my 5.7L Hemi in my GC) , that synthetic oil is really not necessary to achieve very long and reliable engine life.

.......but to each his own.
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Old 06-07-2014, 11:49 AM   #68
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I do not think synthetics are the end all and be all of oils. If you are doing a short change interval, 3,000 miles, then a good, quality, name brand conventional or semi-syn oil is fine. If you are running 5,000 to 7,500 or more on a cycle then I would want a synthetic.

That said, I have been using Mobil 1 synthetic products since they came out back about 79 and I have accumulated significant mileage on several vehicles with it and as well I have been privy to some oil testing back long ago. I would be comfortable with any name brand product, conventional or synthetic, just consider your use and change intervals and you will be fine.

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Old 06-07-2014, 12:17 PM   #69
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I do not think synthetics are the end all and be all of oils. If you are doing a short change interval, 3,000 miles, then a good, quality, name brand conventional or semi-syn oil is fine. If you are running 5,000 to 7,500 or more on a cycle then I would want a synthetic.

That said, I have been using Mobil 1 synthetic products since they came out back about 79 and I have accumulated significant mileage on several vehicles with it and as well I have been privy to some oil testing back long ago. I would be comfortable with any name brand product, conventional or synthetic, just consider your use and change intervals and you will be fine.

J
If you are changing your oil at less than 7,500 miles, there is no reason to buy synthetic. It's just a waste. I mean whatever floats your boat, but if you're changing at 3,000 miles you are simply changing too often. The manual of your jeep lists that basically unless you're driving in a desert every day at 90+ degrees and going on constantly short trips, you should change your oil at 7,500 miles. And that is with conventional oil.

The 3,000 mile oil change is a myth invented to make you waste money. If you want to know when to change your oil, check your manual. Don't pay attention to what the jiffy lube station says. They just want you to keep coming back...
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Old 06-07-2014, 01:27 PM   #70
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If you are changing your oil at less than 7,500 miles, there is no reason to buy synthetic. It's just a waste. I mean whatever floats your boat, but if you're changing at 3,000 miles you are simply changing too often. The manual of your jeep lists that basically unless you're driving in a desert every day at 90+ degrees and going on constantly short trips, you should change your oil at 7,500 miles. And that is with conventional oil.

The 3,000 mile oil change is a myth invented to make you waste money. If you want to know when to change your oil, check your manual. Don't pay attention to what the jiffy lube station says. They just want you to keep coming back...

That is your anecdotal based opinion. I accept you have an opinion and I have given mine.

J
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Old 06-07-2014, 01:43 PM   #71
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His "opinion" is based on fact and I agree with him as I am in the trade. Like he said go read your manual or goto school and learn about oil lubrication and delivery systems and how they work, and when you come back with a Diploma saying you know more then the average person on that subject then you will see what we are talking about .

Who you going to believe? The loser at Jiffy Lube making $12 an hour that gives two shits about you or your car and just wants your service back ASAP because it makes his boss happier. Or are you going to believe the Engineers and Lawyers with thousands of dollars invested in education and the years of experience. That would not mislead you due to lawsuits. I think they know what they at talking about when they write manuals and service intervals
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Old 06-07-2014, 02:13 PM   #72
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Ok, gentlemen if this thread turns into a pissing match it will be closed! Agree to disagree and state your opinions without personal attacks!
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Old 06-10-2014, 09:45 PM   #73
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Would anyone change their minds that synthetic was the next best thing to sliced bread if they learned that some items actually run significantly cooler when lubed with a conventional lubricant than with a synthetic?
It's all got its purpose. Synthetic in the engine and tranny to combat breakdown under combustion/shear conditions, conventional in the diffs to help cool the gears better. Synthetic in the blinker fluid reservoir to make the clicker go faster...
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Old 06-10-2014, 10:48 PM   #74
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]I did work for and was a mechanic for Fedex, 16 years. Fedex used conventional oil we got 250,000 miles out of our gas vehicles with 5k oil changes. If there was any value in synthetic oil I'm sure Fedex would have used it?
You're right; there is no value putting expensive synthetic engine oil in a fleet of FedEx delivery trucks. The engines in those trucks are not modified. A conventional engine oil can adequately protect them.

And to be honest, I don't think synthetic is any more beneficial than conventional when used in a naturally-aspirated, stock Jeep.

There are some naturally-aspirated vehicles that come from their factory with synthetic, but these are usually sports cars. The Jeep doesn't fit into that category.

Nevertheless, I'd still use synthetic because...heck, I have no valid reason. I'll be honest with you; I don't.

I think in a Jeep without engine modifications, both conventional and synethetic would offer the same protection.

Now if the Pentastar engine was turbocharged (which causes increased engine oil temperature) or was able to rev to 9000 rpm (which also increases the engine oil temperature due to friction), then yes, synthetic would be called for. But, 90% of Jeeps will not see that kind of engine performance.

Part of me still wants to use Mobil 1; to each his own. Habits are hard to break.
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Old 06-10-2014, 10:58 PM   #75
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His "opinion" is based on fact and I agree with him as I am in the trade. Like he said go read your manual or goto school and learn about oil lubrication and delivery systems and how they work, and when you come back with a Diploma saying you know more then the average person on that subject then you will see what we are talking about .

Who you going to believe? The loser at Jiffy Lube making $12 an hour that gives two shits about you or your car and just wants your service back ASAP because it makes his boss happier. Or are you going to believe the Engineers and Lawyers with thousands of dollars invested in education and the years of experience. That would not mislead you due to lawsuits. I think they know what they at talking about when they write manuals and service intervals
I was in the trade also, I do not work at Jiffy Lube, I make a whole lot more than $12.00 an hour but thanks for the insult. I have several degrees including Masters and plus 30 and I am an A&P and a master mechanic. A little of my handy work awaiting completion of the airframe (by me also), IO360, custom fuel injection, mostly built from Superior PMA parts and painted Viper yellow, also by me:



Not everybody here is a teenager, just starting out, I have already finished most of my careers and as I said, I will stay with exactly what I said in my initial post in this thread. I accept you have an opinion, I have stated mine and will stay with it.

J
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Old 06-11-2014, 12:39 AM   #76
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I have a couple hundred hours behind that engine... never a hiccup... knock on wood.
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Old 06-12-2014, 01:05 PM   #77
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Even Jeep is trying to say change oil every 3000 in my manual..... yet the service manual says 6000 miles for conv. oil.... go figure. I knew an GM engineer who agreed.... every 3000 miles was wasting money, it just gave the service department more opportunities to find something needing repair. My manual.... has a lot of THINGS NEEDING DONE that isnt in the service manual i have.
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Old 06-12-2014, 07:03 PM   #78
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its my money if i want to change my oil every 3000 so what mobil one does not brake down as fast as conv oil bottom line.
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Old 06-12-2014, 07:35 PM   #79
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I use valvoline full synthetic in my 05' TJ. I Chang the oil every 10-12 thousand miles which usually ends up about 2-3 x a year. My jeeps oil always stays at the full mark on the dipstick so it burns no oil, and I drive the crap out of it here in the arizona desert 100 mile round trip to work 6 days a week. I think that if you use a full synthetic oil and drive your car almost every day for over 30 min at a time you will be fine changing the oil every 6-10 thousand miles.
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Old 06-12-2014, 08:36 PM   #80
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its my money if i want to change my oil every 3000 so what mobil one does not brake down as fast as conv oil bottom line.
Walmart, Target, or 7-11 conventional engine oil wouldn't break down at 3,000 miles.
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Old 06-12-2014, 08:56 PM   #81
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I was in the trade also, I do not work at Jiffy Lube, I make a whole lot more than $12.00 an hour but thanks for the insult. I have several degrees including Masters and plus 30 and I am an A&P and a master mechanic. A little of my handy work awaiting completion of the airframe (by me also), IO360, custom fuel injection, mostly built from Superior PMA parts and painted Viper yellow, also by me: Not everybody here is a teenager, just starting out, I have already finished most of my careers and as I said, I will stay with exactly what I said in my initial post in this thread. I accept you have an opinion, I have stated mine and will stay with it. J
I never said you made $12 but way to be uber sensitive and try and justify your opinion with outdated information. How long you been out of the trade? It's an ever evolving trade and technology that gets updated and changed almost yearly now, hence why a lot of "Mechanics" retire cause they can't keep up or just aren't smart enough too. Maybe not your case, but you did refer yourself as a Mechanic and Mechanics are parts changers around here. I would never let a mechanic fix my vehicle. I would only let a Technician fix my car because they actually know how it works . And your right not all of us are teenagers just starting out. You should sit down with my mentors, true technicians not mechanics that will tell you the same thing as I say did due to there 30+ years in the trade as well and they are still in the trade because they are able to keep up with technology and except it and not be stubborn and think what they learned 30 yrs ago still stands today. If you can't keep up this trade you get out of it, hence why there is such a huge demand for Techs around because all the ole boys couldn't cut it anymore. I've worked with plenty. Just my opinion
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Old 06-12-2014, 08:59 PM   #82
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its my money if i want to change my oil every 3000 so what mobil one does not brake down as fast as conv oil bottom line.
Hence there is no plausible reason for you to change it that often... Conventional or otherwise.

Why would anyone be opposed to saving money, saving time, and helping the environment all at no risk to your car? Would you run premium gas in a Honda...?
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Old 06-12-2014, 09:06 PM   #83
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hence there is no plausible reason for you to change it that often... Conventional or otherwise. Why would anyone be opposed to saving money, saving time, and helping the environment all at no risk to your car? Would you run premium gas in a honda...?
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Old 06-12-2014, 09:41 PM   #84
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OK, so I plan to switch from M1 to a synthetic blend. Since it has both, it has to be right. Right?
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Old 06-12-2014, 11:24 PM   #85
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OK, so I plan to switch from M1 to a synthetic blend. Since it has both, it has to be right. Right?
Why bother asking? It's your Jeep. You do what you want.
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Old 06-13-2014, 06:07 PM   #86
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Would you run premium gas in a Honda...?
https://www.google.com/webhp?sourcei...#q=honda%20nsx

depends on the honda
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Old 08-03-2014, 10:26 AM   #87
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What are thoughts on interval vs. mileage? In other words, I only put about 2,000 miles per year on either the TJ (conventional) or JK (synthetic) and the recommended 6 month interval regardless of mileage seems like overkill.
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Old 08-03-2014, 10:53 AM   #88
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Just did the first oil change since getting my 97 Wrangler. I was considering switching to Mobil 1 Synthetic since it was on sale, but ended up staying with standard. Anyone recommend or not recommend this? Btw theres around 78k on the engine.
Reg oil, Change every 3K use fram filter, n go on vaca with $$ saved!
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Old 08-03-2014, 10:07 PM   #89
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Reg oil, Change every 3K use fram filter, n go on vaca with $$ saved!
fram filters suck I will never buy anything fram to save my life.
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Old 08-04-2014, 01:10 AM   #90
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What are thoughts on interval vs. mileage? In other words, I only put about 2,000 miles per year on either the TJ (conventional) or JK (synthetic) and the recommended 6 month interval regardless of mileage seems like overkill.
Not overkill unless you like the idea of acid and water hanging out in your engine and destroying all the bearings.

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