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Old 09-23-2007, 07:47 AM   #1
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10 myths about synthetic oil.

Seen quite a few posts about synthetic oil and just as many myths mentioned in replies to the origional posters. So I figured I would post this link about it to help people that are interested.

http://www.synthetic-motor-oil-chang...ynthetic-oils/

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Old 09-23-2007, 07:49 AM   #2
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So when we changing my car over to syn?

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Old 09-23-2007, 07:53 AM   #3
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So when we changing my car over to syn?
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Old 09-23-2007, 09:53 AM   #4
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Nice post Od. The syn bashers frustrate me with myth based fears. Using syn in my first jeep (99XJ) was great. Sold it w/85K on it and you could check the dipstick 4K after last oil change and was still gold and translucent and the engine was pushing 90K!
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Old 09-23-2007, 12:26 PM   #5
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synthetic oil is not needed.
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Old 09-23-2007, 12:47 PM   #6
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Originally Posted by mrbigjeep View Post
synthetic oil is not needed.
It is all personal choice if a person wants to use synthetic. This is just a list of myths that SOME nay-sayers use to justify their opinion. If someone chooses to use synthetic they shouldn't have to base their choice on untrue myths.
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Old 09-23-2007, 01:13 PM   #7
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x2
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Old 09-23-2007, 08:14 PM   #8
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i used to have an rx-7. i dont think i ever heard enough bitching about me using syn in that. but test results are test results, no harm no foul.
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Old 09-23-2007, 09:01 PM   #9
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Quote:
Originally Posted by Odhinn View Post
It is all personal choice if a person wants to use synthetic. This is just a list of myths that SOME nay-sayers use to justify their opinion. If someone chooses to use synthetic they shouldn't have to base their choice on untrue myths.
synthetic is fine. but conventional oil works just fine and its a lot cheaper.
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Old 09-23-2007, 11:30 PM   #10
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Just b/c the thread is saying syn is okay despite common myths and misconceptions doesn't mean the thread is also saying that traditional oil is bad!
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Old 09-24-2007, 12:46 AM   #11
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i used to have an rx-7. i dont think i ever heard enough bitching about me using syn in that. but test results are test results, no harm no foul.
doesent an rx-7 have a diff. type engine though? I thought it had a rotary engine in it..could be something there
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Old 09-24-2007, 06:18 AM   #12
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Quote:
Originally Posted by nregas1 View Post
Just b/c the thread is saying syn is okay despite common myths and misconceptions doesn't mean the thread is also saying that traditional oil is bad!
x2

Biggest problem with regular oils is that a few are still paraffin based, and after time COULD make an engine look like this inside (see below). I have rebuilt several engines that were as bad or worse then the ones below. The customers had records of regular oil changes. Not all regular oils are paraffin based just a few and those few are no good (My opinion based on experience). The key to long engine life is Lubrication. Type and how fast it gets to all the moving parts are equally important.









Like I said above it is all personal choice, but I would stay aways from the paraffin based oils.
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Old 09-24-2007, 06:25 AM   #13
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paraffin based being synthetic?
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Old 09-24-2007, 06:33 AM   #14
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paraffin based being synthetic?
Nope, regular oil. Penzoil, was the biggest culprit on most of the engines I worked on. It was so bad that we actually called it penzoil disease. I personally don't know what synthetic is based on but I know the engines I have gone into that used it were almost like new. Key here is that your engine survives on oil, Garbage in Garbage out. So whether you use Synthetic or Organic just make sure you use quality stuff.

All my opinion of coarse.
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Old 09-24-2007, 07:07 AM   #15
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OK my early morning without coffee made me confuse the terms it is actually Naphthenic based engine oils that I ment.
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Old 09-24-2007, 08:03 AM   #16
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I know a lot of oils used to have a wax content in them. Not sure if they still do, so parafin would have been applicable a few years ago. Cheap valvoline had a lot of wax in it.
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Old 09-24-2007, 08:23 AM   #17
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thats what I thought parafin was... ok now that I'm good and confused, use synthetic?
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Old 09-24-2007, 08:48 AM   #18
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Quote:
Originally Posted by foxinthemudd View Post
thats what I thought parafin was... ok now that I'm good and confused, use synthetic?
No no, use whatever you want is the whole point. Just avoid the stuff that makes your engine gunk up.
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Old 09-24-2007, 09:11 AM   #19
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thats what I thought parafin was... ok now that I'm good and confused, use synthetic?
Sorry fox. I started this thread because I was tired of seeing some people get false advice on why NOT to use synthetic. Regular oil is fine, just use quality. The best stuff will be the clearest as it should have less impurities in it. The Organic oils we have been using in the Acura are Castrol or Rotella (depends on what the oil looks like when I get the supplies). I personally stay away from Penzoil, and Quaker state (due to my experiences).

The synthetics we use in the Jeep are Mobile 1, and Royal Purple.
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Old 09-24-2007, 12:50 PM   #20
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Im using Castrol GTX ^_^


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Old 09-24-2007, 07:33 PM   #21
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Just b/c the thread is saying syn is okay despite common myths and misconceptions doesn't mean the thread is also saying that traditional oil is bad!

and i didn't say it was either.
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Old 09-24-2007, 08:45 PM   #22
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Quote:
Originally Posted by mrbigjeep View Post
and i didn't say it was either.
10-4
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Old 09-24-2007, 08:52 PM   #23
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Quote:
Originally Posted by dwdrums801 View Post
doesent an rx-7 have a diff. type engine though? I thought it had a rotary engine in it..could be something there

yes, 1.3 rotary. those engines are meant to burn oil off. used to be synthetics wouldnt burn like normal oils but probably in the past 10 years or so theyve changed the formulas to mimic the real stuff. even better in some instances
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Old 09-24-2007, 09:43 PM   #24
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I have been saying that Penzoil is crap, for years. When you drain it, at regular drainage intervals, it comes out like water. They should change their name too, " Rebuild Motor Soon"..............That's it, RMS Oil...............
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Old 09-25-2007, 07:20 PM   #25
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10-4
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Old 09-26-2007, 08:47 PM   #26
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I am not going to bash or premote. just put what I have seen... I have alot of old vechiles.. my cj I run 5-30 or what ever since it blows it out anyways.. my comanche I use 15W40 rotella, in my 2.5 I have no complants 300k tried and true. My subaru is my synthetic car. its turbo charged and more about preformance. I use synthetic for the turbos sake.. the biggest thing about syn is its a such smaller molucle than conventional. if you put it in a high milage engine odds are your going to find any spot thats not sealed tight. the oil can migrate through seals easier since its not as dense. as for switching back and forth I donno never tried...

Thats what I have learned from experiances, and not what ams oil puts on the net.. Oh ya heads up ams oil(makes synthetic oil),,, bias point of view
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Old 09-26-2007, 09:02 PM   #27
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Dino oils are not what they used to be. The test and requirements for them have changed and not for the better with engines like ours. Just because you got 300K out of an old engine does not mean that you could do that again with today's dino oil.
Advantages to syn oils (copy & paste from a friend of mine who knows everything there is to know about oil )

:
Quote:
Originally Posted by DoctorD on RoF
~ Better stay-in-grade viscosity

~ Better cold pumpability faster feed to lifters and valve guides

~ Better sludge resistance, lower volatility

~ Better antiwear protection for sliding tappets (the OLD dino oil was OK, but the NEW dino oil's not)

~ Improved fuel economy

~ Extended drain interval due to higher TBN

I understand the 4.0 you have went 360K plus. That's VERY typical.... It's NOT typical if you started out today with today's mineral oils
Advantages to Dino oil

Its cheaper per oil change, not necessarily cheaper over the life of the Jeep.
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Old 09-26-2007, 10:59 PM   #28
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Dino oils are not what they used to be. The test and requirements for them have changed and not for the better with engines like ours. Just because you got 300K out of an old engine does not mean that you could do that again with today's dino oil.
Advantages to syn oils (copy & paste from a friend of mine who knows everything there is to know about oil )

~ Better stay-in-grade viscosity

~ Better cold pumpability faster feed to lifters and valve guides

~ Better sludge resistance, lower volatility

~ Better antiwear protection for sliding tappets (the OLD dino oil was OK, but the NEW dino oil's not)

~ Improved fuel economy

~ Extended drain interval due to higher TBN


Advantages to Dino oil

Its cheaper per oil change, not necessarily cheaper over the life of the Jeep.

X2

In my opinion, dino is never better.........maybe cheaper..........maybe as good.............never better.
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Old 09-08-2009, 12:48 PM   #29
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Im using Castrol GTX ^_^


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I bought my TJ with about 70k miles on it. I was unsure as to whether or not the previous owner had been using synthetic, so I decided to use GTX as well. I didn't decide to avoid synthetic because I believed in the old wives tales about it, but because I was concerned about the clearance between the piston rings and the cylinder walls being such that the tiny synthetic molecules would blow by them and burn. I love Castrol GTX, and have used nothing else in any Jeep I have ever owned. The reason why GTX is superior is because, since Castrol buys it's base stock instead of putting the money in to making it themselves, they can afford to take the crap out of it that causes sludging. This is why when you look at new Castrol it is much much lighter in color than other oils. The Castrol Syntec I used in my last car (which I bought new) was SPECTACULAR. I will never ever ever use anything but castrol ever again. Ever.
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Old 09-08-2009, 01:47 PM   #30
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Yea, I really love my Castrol GTX.

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