I had the dealer do the first service with the oil change. I was surprised to see they installed 5W20 regular Castrol GTX not the 5W30 that is recommended by the owner’s manual and the oil cap. I asked why and they said that is what Chrysler is recommending. Any comments on this? I tending to go with my old ways and go for 10W40. I live in Florida and I don't believe the 20 weight is a good idea with high heat most of the year.

 

Well I thought only Ford was recommending 5W-20 oil in their cars. I have been using Amsoil 0W-30 Syn with great results. I live in FL as well and would recommend using a premium syn oil if you are concerned about heat.

Tom

 

Tom, are you saying you’re using straight 30-weight syn? The multi viscosity I have no problem with except the 5W and the 20W seemed way to light non-syn. I thing I might go for the 30 straight syn. if your having good results.

 

Not it's a multi grade oil, but it is rated at 0W-30. The number in front of the W is the oils characteristic when cold thus the W designation, which stands for Winter. Refer to http://www.amsoil.com/storefront/tso.aspx for more information.

Tom

 

You will not be happy with a straight weight oil over the long term. 5W30 is recomended. If it's synthetic, will provide better cooling as well as less internal wear.
Leave the Dino oil for the old vehicles that leak when synthrtic is used. You'll pay a little more but if you do your own oil changes, you'll get the $$$ back there.

 

I use Amsoil's 5W-30 oil in my 05 4.7HO.

 

I took this from Amsoils web site.

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AMSOIL Series 2000 Synthetic 0W-30 Motor Oil efficiently transfers energy from the engine to the drivetrain. Its low coefficient of friction inhibits the energy loss to "drag" common to high viscosity oils.

Motorists seeking the ultimate in fuel efficiency may use AMSOIL Series 2000 Synthetic 0W-30 Motor Oil in place of 5W-30 or 10W-30 motor oils.
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I use the 0W-30, one because of its fuel effieciency properties, and second it is rated for 35,000 miles or one year of use. Since I only put about 7,000 miles a year on my truck I guess I am safe. Years ago I had a VW Golf and put 25,000 miles a year on it and changed the oil once a year. I consistantly got 40MPG at 70MPH, when the car was only rated at 34MPG at 60MPH.

Tom

 

Tom this sounds pretty good,what size engine do you have & what are you getting for MPG?


Blu_

 

I have a 3.7L, Quad, 2WD. I average just over 18MPG city driving. The only time I have done any extended highway driving (more than 20 miles) is when I have been hauling a heavy load or towing. In July I drove from FL to NC with the bed fully loaded, towing my motorcycle plus two Kayaks and I averaged about 17MPG at 75MPH. I have the Laramie package which comes with overhead computer display, with average MPG being one of the displays.

I plan to switch my Tranny to full Syn fluid and hope that adds a couple of MPG. I am running full syn in the engine (0W-30), power steering (ATF +4) and differential (80W-140).

Tom