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Unread 02-23-2008, 10:47 AM   #1
cweb
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Best Motor Oil

Just wanted to get various opinions on which Motor Oil you use and think is the best. For my 2000 Jeep Grand Cherokee Laredo, Inline 6 cylinder engine with just over 100,000 miles, and with the rear wheel/part-time/full-time/4-Lo option. What would you recommend for me? I use Quaker State now just because that's what my old man always used and I've never researched any others. I tow something maybe once or twice a year, mostly in-town driving.

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Unread 02-23-2008, 10:50 AM   #2
QuadraTokn
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doesnt matter much the brand. I would get the full synthetic as the extra cost outweighs the potential benefits for me.
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Unread 02-23-2008, 10:52 AM   #3
Windowsrookie
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Oil for the most part is Oil. It doesn't matter much which brand you get as long as you change it regularly. Although I've always been told to stay away from Pennzoil.
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Unread 02-23-2008, 10:56 AM   #4
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Pennzoil is fine unless you like to run your oil for over 3,000, it likes to turn to sludge. I use Valvoline synthetic for high mileage vehicles. (148,000) IMHO I would not go with a full synthetic unless it has been ran in your Jeep from the get go.
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Unread 02-23-2008, 11:01 AM   #5
SpeedyCat3
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Mobil 1 for me...
Been running it for longer I can remember.
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Unread 02-23-2008, 11:22 AM   #6
QuadraTokn
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Quote:
Originally Posted by Speedycat View Post
Mobil 1 for me...
Been running it for longer I can remember.
How often do you change it?
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Unread 02-23-2008, 11:51 AM   #7
SpeedyCat3
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I do my oil changes every 5000 miles or so.
Usually twice a year in the Heep, and three times a year in the Expedition.
The Corvette is in a different schedule since it only rolls 400 to 500 miles a year...
The important thing is using good oil and good filters. all filters are definitely not created equal.
The Expy started using Mobil 1 at 60K miles, the Grand at 150K, the Corvette after the rebuild in 1994, and so on and so forth.
I have not seen excesive leackage due to the synth oil, but it definitely comes out cleaner and no sludge when I change it.
Since I do my oil changes myself, ( and I take pride on that) I buy the best stuff I can, and still come out close in price to a Jiffy Lube job with recycled oil.
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Unread 02-23-2008, 12:02 PM   #8
haumana
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to the forum. I would highly suggest you add the details of your Jeep to your signature ... You can generally get answers a lot quicker that way

I know that I've posed this question several time (since I've had several Jeeps). I ended up sticking with good old dino: Valvoline 5w30 as specified. I've always been a synthetic person, but based on how I drive the dub, some JF members said that synthetic would just be a waste of money. I think I would be more concerned with the type/brand of filter you use ... lots of JF opinions there too.

I even considered putting in an additive (i.e. Lucas, etc.), until someone posted this link ... after reading it I thought, "Oh no, what did I just do to my previous vehicles?" It's a good read, and I highly recommend it.

http://www.bobistheoilguy.com/images/lucas/lucas.htm
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Last edited by haumana; 02-23-2008 at 12:14 PM..
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Unread 02-23-2008, 12:08 PM   #9
QuadraTokn
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Quote:
Originally Posted by Speedycat View Post
I have not seen excesive leackage due to the synth oil, but it definitely comes out cleaner and no sludge when I change it.
it would only leak if there was dino oil plugging up old leaks (holes in gaskets), as it would clean those deposits out well.
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Unread 02-23-2008, 12:14 PM   #10
SpeedyCat3
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Well...
That is were good preventive maintenance pays.
I like to keep my engines clean, so they get degreased and powerwashed in low pressure avery coiple of months, usually during the week preceeding the oil changes...
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Unread 02-23-2008, 12:24 PM   #11
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I use Fram oil filter, thoughts?
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Unread 02-23-2008, 12:26 PM   #12
QuadraTokn
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I use wix filters. found at Napa and carquest. i have no good reasons for using them other than internet research always saying Wix is the best and fram is the worst.
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Unread 02-23-2008, 12:52 PM   #13
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i use a 20-50 synthetic oil, mainly because i get it for free. and I use mopar filters. cahnge it every 5k. No prolbems
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Unread 02-23-2008, 01:04 PM   #14
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I run Valvoline 10w-30. Definitely look at the oil filter you use. From what I have researched, I'd say stay away from Pennzoil, STP, Fram, and Quaker State filters. Bosch ones are pretty good and so are ones made by Purolator sold under other brand names.

More than you ever wanted to know about oil filters: http://www.knizefamily.net/minimopar.../opinions.html

As for oil, really it is all the same except for maybe additives that claim whatever. As long as you change it every 3k (which a lot of people disagree with), you can run whatever oil you want really. I prefer to stick with well known brands myself.
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Unread 02-23-2008, 01:11 PM   #15
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a little off topic but what weight of oil is best? i use 10w 40 so its a little thicker than what the book says. i just think that the 5w 30 that they say to use is more like water and doesnt do anything while its in the engine.
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