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Unread 08-27-2007, 10:44 AM   #1
skid2964
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What weight synthetic oil?

I have never used any synthetic oil, but I just bought a new vehicle and decided I would try it after I put the initial 1000 miles or so on it.

If my engine calls for 5W-20 Conventional oil, should I stay with that weight oil? or would 5W-30 or 10W-30, etc be ok or even preferred?

Also, what is best Synthetic to use, they all the same?

Thanks

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Unread 08-27-2007, 11:30 AM   #2
hunter44102
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And to add to the confusion, Mobil 1 is now selling TWO kinds of 5w30, they sell the normal Synthetic and a new SUV/Truck 5w30 synthetic!

I am going to use the regular 5w30 synthetic.
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Unread 08-27-2007, 11:54 AM   #3
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fwiw... On many, many recommedations, but no personal experience yet, I am going with Amsoil 5w-20 synthetic.
Gonna change at 1500, then do a oli/change tire rotation every 5000 after that.

Jim
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Unread 08-27-2007, 11:55 PM   #4
steel5blue
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After some research I decided on Mobil 1, 5w30. I live and drive in hot weather, at least some of the time, and trust the higher 30 protection more than the 20.
Chrysler does recommend 5w30 for the Compass outside of the US market.
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Unread 08-29-2007, 09:37 AM   #5
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My guess is the 20 would in theory at least, give some measure of increased mpg. I feel safer with the 30w also.
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Unread 08-29-2007, 01:56 PM   #6
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Mobil1 recommends 5w30 on there website
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Unread 09-15-2007, 11:21 PM   #7
nujeepguy
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some research has been done on 20 weight and it is in serious question as to it's overall ability to protect . i would go with the vast recommedations of the auto world and stay in the 30 weight . it won't harm an engine specifying 20 weight.
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Unread 09-16-2007, 07:19 AM   #8
Gramps
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I'll throw in my on this.

Since there was an addendum to the Owners Manual for the EU saying to run 5W-30 I'd have to conclude that it would be perfectly OK to run it N.A. or anywhere else too.

It's been my interpretation that many of the newer engines, not just the New World Engine, are build to closer/tighter tolerances than the old I6's and V8's that we're used to running and the 5W-20 allows for better gas mileage, easier cold weather starting, etc. Mine was very easy to start last winter, parked outside, no engine heater or blanket, at 20 - 30 below 0.

Living in the Snow Belt, I am going to stay with the 5W-20 for the Winter and I'm considering changing to 5W-30 in the Summer. If I was living in the Sun Belt I would probably run 5W-30 all year.
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Unread 09-16-2007, 08:35 AM   #9
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I used to have a ford escape that used 5w-20. Motorcraft makes a nice 5w-20 synthetic blend that wal-mart sells for $2.30 a quart. I have a bunch left over.....am i crazy for thinking I shouldn't put ford oil in a chrysler motor???? I have had many cars , trucks, and Jeeps over the years and my conclusion is that Ford oil will not harm the Chrysler motor.
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Unread 09-16-2007, 08:57 AM   #10
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As long as the spec on the container meets the spec in the owners manual you should be fine, I'd be surprised if it didn't. Tranny fluids, now that's a different story.
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Unread 09-16-2007, 10:34 AM   #11
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5w20, 5w30, doesn't matter, the lifters on this engine will still be loud as hell. =D Its not going to change a thing, no matter what climate you're in.
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Unread 10-20-2007, 05:35 PM   #12
RichJet5353
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mixing oils

2 questions. Will using a 5-30 conventional oil void the warranty when the owner's manual calls for 5-20? and how's this idea for added protection without much added cost, add one quart of synthetic 5-20 to three or four quarts of conventional oil. Would love to hear back on these ideas.
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Unread 10-21-2007, 05:22 AM   #13
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The requirement is that whatever oil you use it meets API Certification and DaimlerChrysler
Material Standard MS-6395.

The Recommendation is that it be 5W-20.

Quote:
Engine Oil Viscosity (SAE Grade)
SAE 5W-20 engine oil is recommended for all operating
temperatures. This engine oil improves low temperature
starting and vehicle fuel economy. Your engine oil
filler cap also states the recommended engine oil viscosity
grade for your engine.
Lubricants which do not have both, the engine oil certification
mark and the correct SAE viscosity grade number
should not be used.
My opinion on the weight of the oil is in post #8. If the EU can run 5W-30 then NA can run it too.

Most 5W-20 oils are at least partially synthetic. I can see no advantage of mixing oils but, as long as they meet the spec I can see no harm either. Never mix different weights.
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