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Old 09-19-2010, 09:14 PM   #1
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oil

so i just got my jeep couple weeks ago and need to do an oil change not sure if mobile 1 senthatic is the best for the jeep any recomendations

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Old 09-19-2010, 09:24 PM   #2
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Personally, I am definitely no fan of Mobil-1 for the cast iron 4.0L block. Oil analysis tests with Mobil-1 indicate an abnormally high iron content after extended use in the 4.0L engine.

Personally, I use Valvoline 10W-30 but nearly any other modern multi-weight engine oil is fine. I would only use a synthetic during the winter and then only if I lived where it got uber-cold like in North Dakota, Minnesota, Buffalo NY, etc.

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Old 09-19-2010, 09:31 PM   #3
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Valvoline all the way baby!
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Old 09-19-2010, 09:52 PM   #4
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I was running Schaeffer Oil...but I honestly didn't notice a huge difference switching from Valvoline to it, so I'll prolly switch back to Valvoline.
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Old 09-19-2010, 10:08 PM   #5
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Castrol is the only thing that goes in any of my vehicles. This includes my 402 big block Chevrolet that has over $8000 invested in it.
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Old 09-19-2010, 10:17 PM   #6
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Valvoline here!!!!
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Old 09-19-2010, 10:19 PM   #7
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Havoline 10w-30 in my 2.5L
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Old 09-19-2010, 10:58 PM   #8
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Whatever Big Name Brand oil that is on sale and contains the latest API rating (SL or SM) . My recent stask has included Valvoline, Pennzoil, Quaker State and Castrol. Mostly 10W-30 but some 5W-30 for winter.
Click here for API Ratings and technical info.

Know what you are getting when paying premium prices for synthetics. There are blends, semi synthetics, full synthetics and truly synthetics (such as the European Castrol 0W-30). Synthetic in Europe means from Group IV base stocks, in North America it means confusion and marketing to the uninformed/gullible.
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Group II and Group III type base stocks help to formulate more economic type semi-synthetic lubricants. Group I, II, II+ and III type mineral base oil stocks are widely used in combination with additive packages, performance packages, ester and/or Group IV polyalphaolefins in order to formulate semi-synthetic based lubricants. Group III base oils are sometimes considered as synthetic but they are still classified as highest top level mineral base stocks. A Synthetic or Synthesized material is one that is produced by combining or building individual units into a unified entry.
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Old 09-20-2010, 09:05 AM   #9
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Quote:
Originally Posted by lashleyftl View Post
so i just got my jeep couple weeks ago and need to do an oil change not sure if mobile 1 senthatic is the best for the jeep any recomendations
If I were using Mobil 1, I would also use their long life, high efficiency filter.
I use mostly conventional oil with the 5" long Mopar filter (the filter they specify for Fords in cross reference to Ford FL-1A, but which also works great on Chryslers)
Mobil 1 is a very hyped up oil and should be okay. I think Castrol, and others makes a better synthetic. My thinking is influenced by this article.
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A significant number of readers contacted JobbersWorld with regards to several stories we ran starting on December 11, 2008 about Valvoline's claim that "Mobil 1 5W-30 does not meet minimum API SM or ILSAC GF-4 specification because of its inferior performance in the Sequence IVA wear test."
and this one.
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As reported here last July, first Valvoline claimed its Synpower motor oil provided 4X better wear protection than Mobil 1. Then in December Valvoline turned up the heat by further stating that Mobil 1 5W-30 actually failed the Sequence IVA engine test, and not by a small margin.
Now Castrol has jumped on the bandwagon and raised the bar, claiming its new Castrol Edge "provides 8X better wear protection than Mobil 1 5W-30", again citing the Sequence IVA test.
Even today Castrol says its Castrol Edge has 8X better wear protection than Mobil 1 5W-30.

There's a lot of oil hype, and ol filter hype, out there. Many oil filter companies don't tell you much, of value, about their filters like what %efficiency are they. An efficient filter will be in the 97% to 99%+ efficiency range, whereas an ordinary filter may be less than 90%. You get what you pay for.
And now there's the introduction of GF-5 motor oil. Confused yet?
GM seems to be cutting to the chase on oil confusion/marketing and writing its own specifications so that there's no confusion. Their specified oil is called "dexos". Read about it here.
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Old 09-20-2010, 09:53 AM   #10
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I've been using valvoline "high mileage"...its worked, the engine hasn't exploded...Mobil 1 isn't the end all oil that it used to be based on the oil analysis results I've seen (not from Jeeps). actually in the battery of tests I'm vaguely referring to Pennzoil platinum had the best numbers (This was in a Nissan 350z). so when I had that vehicle I ran that oil.
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Old 09-23-2010, 11:53 AM   #11
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Been using quaker state 10-30w for over 10 years in my 2000, change every 3000. miles
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Old 09-23-2010, 11:59 AM   #12
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Quote:
Originally Posted by n116ebo View Post
Been using quaker state 10-30w for over 10 years in my 2000, change every 3000. miles
No need to change it that often, that is just paying for more oil than your engine will benefit from. The 3K mileage oil change interval was just something dreamed up by the quick change oil places like JiffyLube trying to make more $$$. Every 5K miles is perfectly fine, even every 7.5K miles is ok for non-dusty conditions. I've adhered to a 5K oil change interval with nothing but conventional motor oils for over 45 years and I've yet to have an engine failure.
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Old 09-23-2010, 12:19 PM   #13
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Hell, it will go longer than that. My old Ford truck has 532,000 miles on it and it has only had 17 oil changes according to the records. Changed more than I thought. I have to say it is a one in a million. Replaced water pump once, brakes 8 times, alternator once and tires about every 50,000 and that is it. Still running on original clutch. I hope my Jeep last like it has
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Old 09-23-2010, 12:22 PM   #14
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Castrol gtx is the only thing I'll ever use myself. Bought a car once from someone who had used it the entire life of the vehicle. It currently has 250k on it and the dip stick looks brand new and the motor runs just as strong as the day it rolled off the lot. Great stuff.
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Old 09-23-2010, 03:34 PM   #15
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I've always been a fan of Valvoline and had real good luck with it.
I bought another motor in my last truck and the guy always used Castrol so I didn't want to change and that motor has 250k without using any oil or smoking and i recently sold it to a friend. My current truck also had Castrol used in it when I got it at 57k miles and so I kept using Castrol in it and I'm at 120ish k on it now without using a drop or any smoking or leaks. That's what the previous owner of my 97 TJ used so I'm still going to keep on it tool

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