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They say it is compatable with 5W20. Any thoughts?
 

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I drive my 300c VERY hard. I only average 16mpg. I have performed 2 oil changes to my car and I have used Mobil 1 0w20. I read this as well. I trust Mobil 1. Oil looked good when I changed it yesterday. I change it every 3000 miles. I know that you can go longer but I choose not to. I also perfer the K and N oil filter (part # HP-2004)
 

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lacadac said:
I drive my 300c VERY hard. I only average 16mpg. I have performed 2 oil changes to my car and I have used Mobil 1 0w20. I read this as well. I trust Mobil 1. Oil looked good when I changed it yesterday. I change it every 3000 miles. I know that you can go longer but I choose not to. I also perfer the K and N oil filter (part # HP-2004)
I looked at Mobil 1 (my oil of choice) and would use the 0w20 if it were listed in the manual as an alternate. DC is scary when it comes to rejecting warranty claims. Don't want any MDS FUBAR (fouled up beyond all recognition) with the "wrong weight" oil that DC would claim in the event of an engine failure. We both know the 0w20 would not be the cause but who has the resources to fight DC in court. And if you won, the legal fees alone could buy an SRT8 and a Z06. I use the oversized Amsoil filter for an extra 1/2 qt filtration, I looked at K&N but did not like the "impregnated resin" in the filter, is this stuff like PTFE, remember the disasterous ARCO graphite oil from the 70s. I also run Filtermag and Turbomags on the pan bolt and transmission pan. Castrol Syntec 5w20 is my choice.
 

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I also trust Mobil 1 and saw this on their website: Product Description
Mobil 1 0W-20, Power and Performance Formula, is the most advanced performance synthetic engine oil designed to provide the ultimate level of power, and protection to keep engines running smoothly and cleanly. Mobil 1 0W-20 exceeds the requirements of the latest gasoline and diesel powered automobile engines. Mobil 1 0W-20 is the ideal product for high revolution and output four and six cylinder cars where a 0W-20 or 5W-20 viscosity lubricant is recommended.
I decided to go with Castrol Syntec 5W-20 to avoid the possibility of a warranty dispute if needed.
 

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I went with Amsoil XL-7500 5W-20 to stay well within the warranty requirements. While not their best oil, it should be a good one. I'm changing to it this weekend. I would have used Amsoil Series 2000 0W-30 (their best) if it weren't for this MDS stuff.
 

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I use mobil 1 0W-20, because when I have the dealer perform my oil changes, that's what they put in. I would like to see them give try to void my warranty.
 

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I use it.

I also use the mobil 1 0w-20. I asked the dealer first, and they had no problem with it. Had them do the oil change, and used the mobil 1 filters as well.
 

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I Just bought mobil 1 0w-20 and will have the dealer install it when I bring it in to have rattles taken out of my sun roof, and evic average mpg adjusted. Last tank full read 17.2 mpg and an actual calculation was 23.9mpg! P.S. I love this car!!!
 

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FOAMAVEN said:
I Just bought mobil 1 0w-20 and will have the dealer install it when I bring it in to have rattles taken out of my sun roof, and evic average mpg adjusted. Last tank full read 17.2 mpg and an actual calculation was 23.9mpg! P.S. I love this car!!!
Make sure you RESET the mileage in EVIC to get the proper MPG. If you dont, you will get the "running avge" since the last time you reset it. So even thought the most recent trip you tooook between last fill ups got you 22MPG...when avged over the last several tanks it is only 17.6. Just a thought.
 

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LWOOD said:
I use mobil 1 0W-20, because when I have the dealer perform my oil changes, that's what they put in. I would like to see them give try to void my warranty.
I agree, the dealer is DC and if they do it it's on them if there is a problem. Many of us who change our own oil only have the autozone receipt and our log book which is why I will have the dlr do my changes as long as I am under warranty every 6K and bring my own oil and filter.
 

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Blue said:
Make sure you RESET the mileage in EVIC to get the proper MPG. If you dont, you will get the "running avge" since the last time you reset it. So even thought the most recent trip you tooook between last fill ups got you 22MPG...when avged over the last several tanks it is only 17.6. Just a thought.
Thanks Blue, but I do reset both the trip mileage as will as the mpg, it must be out of calibration.
 

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I stole this from another thread posted by Blankster.QUOTE=Blankster]I just pulled this info off of a Jeep website under TSBs:

09-015-04 ENGINE OIL VISCOSITY GRADES FOR 5.7L MULTIPLE DISPLACEMENT SYSTEM (MDS)
Date: 11/04/04

Model year(s): 2005

Description: Vehicles with the 5.7L Multiple Displacement System (MDS) must use SAE 5W-20 oil. Failure to do so may result in improper operation of the Multiple Displacement System(MDS).

NOTE: This information applies to U.S. and Canada markets only.

NOTE: For additional information refer to the
 
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