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Old 12-28-2019, 11:39 AM
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Should I switch from conventional to synthetic motor oil?

I found it very interesting yesterday when I went into both Walmart and Advanced Auto and noticed they only carried one brand of conventional motor oil. Most others wee full synthetic and some were blends. I'm assuming most other stores are the same.



My 2013 JK has only ever seen conventional. Should I give in and just switch to some sort of synthetic from now on? FYI: My Sahara has 64k miles.

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Old 12-28-2019, 11:52 AM   #2
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Depends on what you want I guess. If you switch, do your research and look for a quality synthetic oil. I use strictly Amsoil. It is a little more expensive but it is the lifeblood of your engine and for that I will spare no expense.


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Old 12-28-2019, 12:10 PM
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Depends on what you want I guess. If you switch, do your research and look for a quality synthetic oil. I use strictly Amsoil. It is a little more expensive but it is the lifeblood of your engine and for that I will spare no expense.


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What I want would be to stick to conventional oil but it seems as though I am slowly losing options on what kind to buy.
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Old 12-28-2019, 12:21 PM   #4
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Not a problem to change, do it if you want, but if you don't want, then find a better store. There is no lack of options for conventional oil.

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Old 12-28-2019, 01:18 PM   #5
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Keep using what you like until what you like is not available. If you stretch the mileage between changes you might look closer at the syn’s. If you change it frequently use the least expensive oil you like that meets Jeep specs.
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Old 12-28-2019, 01:19 PM   #6
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What oil are you using. Is there some reason you don't use syn.
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Old 12-28-2019, 01:33 PM   #7
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Quote:
Originally Posted by JTPhoto JK View Post
Depends on what you want I guess. If you switch, do your research and look for a quality synthetic oil. I use strictly Amsoil. It is a little more expensive but it is the lifeblood of your engine and for that I will spare no expense.


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X2 on Amsoil! Running signature series, will do the diffs, tcase & power steering cone spring.

Not sure on Amsoil ATF though?
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Old 12-28-2019, 02:23 PM   #8
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I use Redline 5W30 and a Mopar filter. I’m no oil expert, but the higher ZDDP level seems beneficial for this motor. Before I would get some valvetrain noise on a cold start, but not since using Redline.
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Old 12-28-2019, 03:44 PM   #9
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I've always been a synthetic oil fan. I always recommend switching to synthetic oil at your next oil change. Doesn't matter if your engine has 100 or 100,000 miles. LOL
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Old 12-29-2019, 06:00 PM   #10
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Originally Posted by NEPA_Wrangler View Post
What I want would be to stick to conventional oil but it seems as though I am slowly losing options on what kind to buy.

Most of the products labeled as "synthetic" are really just better blends. They're allowed to call it whatever they want, so most of the "synthetic" products that you can buy off the shelf are mostly conventional.


AMSOil is one of the few truly synthetics.


There's no reason to be against synthetic. That's like being against technology.
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Old 12-29-2019, 06:40 PM   #11
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Is pennzoil platinum synthetic good? It's relatively inexpensive and easy to find and all ears to meet Chrysler's specs

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Old 12-29-2019, 06:45 PM   #12
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Is pennzoil platinum synthetic good? It's relatively inexpensive and easy to find and all ears to meet Chrysler's specs

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It is good, Ultra platinum is even better, can be had at great prices too.
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Old 12-29-2019, 06:56 PM   #13
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It is good, Ultra platinum is even better, can be had at great prices too.
Ooo will take a look, thanks!

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Old 12-29-2019, 07:03 PM   #14
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Originally Posted by Muffin Top View Post

There's no reason to be against synthetic.

That's like being against technology.
Not ALL technology is automatically better.... it depends on what you want... any tech has it's pros and cons, just like everything else...

Synthetic oils cost more... so that's a reason to prefer conventional (mineral) oil..

To the OP:
Synthetic oil handles heat better, can provide better lubrication, and stands up to thermal (heat) and mechanical (shearing) breakdown better... but... you probably don't NEED synthetic oils.. even if your engine is operated at extremes (high heat & load conditions), in a street engine application.....

Proper maintenance is the key... a quality conventional oil, changed at proper intervals, will give good service and long engine life...

I have 3 Harley motorcycles... they have air-cooled engines that can get hot in SoCal temps, and a couple of them have higher HP engines that I push a little bit..... I will only run synthetics in my bikes' engines .... yet, many people get 100K+ miles using conventional oil in same/similar bikes and conditions...

I only run synthetic oil in my Ram diesel truck, but I tow heavy at times.... yet, there are many fleet rrucks in commercial service with 300K+ miles on conventional oils.

However, in my 46' boat, with twin Detroit 8V71TI engines, I use a high grade mineral oil... mostly because I change the oil at proper hour usage intervals (and at least once a year regardless of engine hour use), AND a complete oil change (including 2 engines, 2 gears, and 1 generator), uses around 10 gallons of oil..... with my maintenance schedule, I don't feel the need to pay for synthetics in this application...

So buy/use what makes you feel better and fits your budget.... you won't be hurting your engines using either type oil, with a good maintenance schedule...
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Old 12-29-2019, 07:24 PM   #15
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yes use synthetic oil it is better all around cold weather and hot weather protects from cold starts and foaming up in the summer and nets slightly better gas mileage because the engine doesn't have to work as hard and it is about the same price because you don't have to change it as often just make sure you get a quality oil filter
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Old 12-29-2019, 07:32 PM   #16
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yes use synthetic oil it is better all around cold weather and hot weather protects from cold starts and foaming up in the summer and nets slightly better gas mileage because the engine doesn't have to work as hard and it is about the same price because you don't have to change it as often just make sure you get a quality oil filter
I've read that the genuine Chrysler/jeep filter is the best one, true or false?

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Old 12-29-2019, 07:47 PM   #17
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Is pennzoil platinum synthetic good? It's relatively inexpensive and easy to find and all ears to meet Chrysler's specs

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+1 on Pennzoil Platinum
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Old 12-29-2019, 08:08 PM   #18
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Synthetic oil handles heat better, can provide better lubrication, and stands up to thermal (heat) and mechanical (shearing) breakdown better

Also flows better on start-up. They say get 5W-30 for flow on start-up, but maybe synthetic allows for a thicker 10W-30 that flows equally well.


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Not ALL technology is automatically better . . . it depends on what you want

You've got a point there
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Old 12-29-2019, 09:31 PM   #19
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I bought use the Pennzoil Platinum,Ultra or Redline all 5W30 all depending on the best price with a Mopar oil filter. I honestly don't notice a difference. I did notice a difference when the shop I take the Jeep to have it serviced for other things, I let them change my oil and they used standard 5w30 motor oil. The engine sound and how it ran was noticibly different. I took it back and had them change the oil again. I paid the difference for the synthetic oil. I didn't catch on the invoice.
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Old 12-29-2019, 10:58 PM   #20
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Blackstone Labs (who do oil testing) have some metadata over many, many oil samples which show there is not much difference between synthetic and conventional oil. Here's one video, but I remember some articles they published too.


https://www.youtube.com/watch?v=UyAQ...ature=youtu.be


My take is that synthetics have the edge for temperature, lifespan and friction so that is what I use.


I like ester based synthetics (Motul) as they stick to the metal. Try cleaning up Motul if you blow up an engine and you'll see.
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Old 12-29-2019, 11:19 PM   #21
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I like ester based synthetics (Motul) as they stick to the metal. Try cleaning up Motul if you blow up an engine and you'll see.

I used Motul in my Audi, ungodly expensive and oddly made in France. I didn’t think they had much application in the domestic car arena. The only people I ever hear bring it up are those with German cars.
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Old 12-30-2019, 02:33 AM   #22
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Motul is really good oil at really high prices. I use the Pennzoil Ultra premium Platinum 5-20. No ticks ever. Thicker oil is not better oil.
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Old 12-30-2019, 08:08 AM   #23
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I have used Mobil 1 oil in everything we own since the mid '70's
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Old 12-30-2019, 10:34 AM   #24
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You should use what the mfg spec is, especially on modern engines. Modern engines have things like VVT where the oil is used like a hydraulic fluid to control cam phasers and the like. Manufactures don't test with all the stuff people are putting in. They test with the spec'd oil.
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Old 12-30-2019, 12:35 PM   #25
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You should use what the mfg spec is, especially on modern engines. Modern engines have things like VVT where the oil is used like a hydraulic fluid to control cam phasers and the like. Manufactures don't test with all the stuff people are putting in. They test with the spec'd oil.
Strangely, my 2012 doesn't spec type, only weight. 5w-30 for 8k mile oil changes.

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Old 12-30-2019, 12:58 PM   #26
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Strangely, my 2012 doesn't spec type, only weight. 5w-30 for 8k mile oil changes.

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I am on the last of my 5W20, will be switching to 5W30 next change.
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Old 12-30-2019, 01:34 PM   #27
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I've read that the genuine Chrysler/jeep filter is the best one, true or false?

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Most definetly not on the 3.8. The Mopar anti drain back valve is garbage, at least in my experience on my 08. Switching to Wix fully removed the start up "knock".


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Old 12-30-2019, 02:18 PM   #28
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Most definetly not on the 3.8. The Mopar anti drain back valve is garbage, at least in my experience on my 08. Switching to Wix fully removed the start up "knock".


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I found that to be true when I had my hemi ram - mopar filter was garbage.
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Old 12-30-2019, 05:03 PM
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Strangely, my 2012 doesn't spec type, only weight. 5w-30 for 8k mile oil changes.

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This is all my manual states:


SAE 5W-20 engine oil is recommended for all operating temperatures. This engine oil improves low temperature starting and vehicle fuel economy. The engine oil filler cap also shows the recommended engine oil viscosity for your engine. For information on engine oil filler cap location, refer to the “Engine Compartment” illustration in this section.


Synthetic Engine Oils: You may use synthetic engine oils provided the recommended oil quality requirements are met, and the recommended maintenance intervals for oil and filter changes are followed.
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Old 12-30-2019, 05:21 PM   #30
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Strangely, my 2012 doesn't spec type, only weight. 5w-30 for 8k mile oil changes.
The paragraph before Engine Oil Viscosity on page 519 does give a specification:
Quote:
Engine Oil Selection
For best performance and maximum protection for all engines under all types of operating conditions, the manufacturer recommends engine oils that are API Certified and meet the requirements of Chrysler Material Standard MS-6395.

American Petroleum Institute (API) Engine Oil Identification Symbol
This symbol means that the oil has been certified by the American Petroleum Institute (API). The manufacturer only recommends
API Certified engine oils.

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