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5W-20 recommended in dodge 3.7? #1743112
01/14/10 05:59 PM
01/14/10 05:59 PM
Joined: Jul 2005
Posts: 623
Pullman Wa
Buick92 Offline OP
Buick92  Offline OP
Joined: Jul 2005
Posts: 623
Pullman Wa
When did dodge change from recommending 5w-30 to 5w-20 in their 3.7 V6 engines? My 2007 Ram 3.7 (manufactured date 06/2007) says 5w-20 on the oil cap, but 5w-30 is recommended on the dodge website when I downloaded the owner's manual information. Any info would be appreciated.

Re: 5W-20 recommended in dodge 3.7? [Re: Buick92] #1743119
01/14/10 06:02 PM
01/14/10 06:02 PM
Joined: Nov 2004
Posts: 1,859
SD
zrxkawboy Offline
zrxkawboy  Offline
Joined: Nov 2004
Posts: 1,859
SD
Yes, it was right around that time. Our 06 Libby calls for 5W30, but I know that the 08s call for 5W20.

The engine itself was not changed, just the recommendation. I personally prefer 5W30, but either should work fine.


"Think of all the Ford owners who will someday want an automobile." John Dodge

Re: 5W-20 recommended in dodge 3.7? [Re: zrxkawboy] #1743126
01/14/10 06:05 PM
01/14/10 06:05 PM
Joined: Jan 2009
Posts: 13,980
Illinois
tig1 Online content
tig1  Online Content
Joined: Jan 2009
Posts: 13,980
Illinois
Both of my engines call for 5-20 but use either 5-20 or 5-30 with equal good results.


2007 Ford Fusion 235,000 miles
M1 0-20 EP
2017 Ford Fusion 60K
M1 0-20 EP
10,000 mile OCIs on both engines
M1 ATF and Valvoline LV
M1 10-30 in all OPE
MC filters

Re: 5W-20 recommended in dodge 3.7? [Re: tig1] #1743337
01/14/10 08:33 PM
01/14/10 08:33 PM
Joined: Dec 2009
Posts: 3,172
Ohio
beast3300 Offline
beast3300  Offline
Joined: Dec 2009
Posts: 3,172
Ohio
My boss had a 07 Nitro 3.7 that he used 5w20 in with no problem.


'03 Regal GS L67: PPUP 5w30/FU3980

'99 Grand Prix L36: R.I.P.

'07 LaCrosse L26: QS HM 5w30/TG3387A

ASE L1 MT

Re: 5W-20 recommended in dodge 3.7? [Re: beast3300] #1743354
01/14/10 08:41 PM
01/14/10 08:41 PM
Joined: Nov 2009
Posts: 299
Ottawa, Canada
RageOfFury Offline
RageOfFury  Offline
Joined: Nov 2009
Posts: 299
Ottawa, Canada
I'm running GC in my 3.7 Liberty. Engine is loving this stuff. Easy starts, quieter, great protection. Screw CAFE and 5W-20. 5W-30 is what you should run in the 3.7 Powertech.


2014 Jeep Grand Cherokee Limited V6 4x4
Re: 5W-20 recommended in dodge 3.7? [Re: RageOfFury] #1748610
01/19/10 06:47 PM
01/19/10 06:47 PM
Joined: Sep 2007
Posts: 8,598
Florida
artificialist Offline
artificialist  Offline
Joined: Sep 2007
Posts: 8,598
Florida
My mom's 2005 Jeep Grand Cherokee called for 5w30, but I have had great results with 5w20 oil.

The only things that changed on that engine in 2007 were smog devices.


2010 Lancer Ralliart Sportback
Re: 5W-20 recommended in dodge 3.7? [Re: artificialist] #1748637
01/19/10 07:02 PM
01/19/10 07:02 PM
Joined: Nov 2009
Posts: 299
Ottawa, Canada
RageOfFury Offline
RageOfFury  Offline
Joined: Nov 2009
Posts: 299
Ottawa, Canada
Originally Posted By: artificialist
My mom's 2005 Jeep Grand Cherokee called for 5w30, but I have had great results with 5w20 oil.

The only things that changed on that engine in 2007 were smog devices.

Thats not the only thing. They went from drive by wire to electronic throttle. duh


2014 Jeep Grand Cherokee Limited V6 4x4
Re: 5W-20 recommended in dodge 3.7? [Re: RageOfFury] #1749044
01/20/10 07:30 AM
01/20/10 07:30 AM
Joined: Jul 2005
Posts: 624
Colorado, US
mdocod Offline
mdocod  Offline
Joined: Jul 2005
Posts: 624
Colorado, US
Originally Posted By: RageOfFury
Originally Posted By: artificialist
My mom's 2005 Jeep Grand Cherokee called for 5w30, but I have had great results with 5w20 oil.

The only things that changed on that engine in 2007 were smog devices.

Thats not the only thing. They went from drive by wire to electronic throttle. duh


Perhaps I am misunderstanding something.... but wouldn't it be more accurate to say that they went from drive by cable to drive by wire wink


2005 Volvo XC70 2.5L I5 Turbo.
1995 Isuzu Rodeo, 3.2L 4WD Manual. Extensive suspension and drive-line mods.
2009 Hummer H3 Adventure 3.7L I5 Manual.
Re: 5W-20 recommended in dodge 3.7? [Re: mdocod] #1749062
01/20/10 08:02 AM
01/20/10 08:02 AM
Joined: Nov 2009
Posts: 299
Ottawa, Canada
RageOfFury Offline
RageOfFury  Offline
Joined: Nov 2009
Posts: 299
Ottawa, Canada
Originally Posted By: mdocod
Originally Posted By: RageOfFury
Originally Posted By: artificialist
My mom's 2005 Jeep Grand Cherokee called for 5w30, but I have had great results with 5w20 oil.

The only things that changed on that engine in 2007 were smog devices.

Thats not the only thing. They went from drive by wire to electronic throttle. duh


Perhaps I am misunderstanding something.... but wouldn't it be more accurate to say that they went from drive by cable to drive by wire wink

Oops yeah, drive by cable blush

Last edited by RageOfFury; 01/20/10 08:02 AM.

2014 Jeep Grand Cherokee Limited V6 4x4
Re: 5W-20 recommended in dodge 3.7? [Re: RageOfFury] #1749453
01/20/10 02:37 PM
01/20/10 02:37 PM
Joined: Jun 2005
Posts: 4,941
Billings, MT
chevrofreak Offline
chevrofreak  Offline
Joined: Jun 2005
Posts: 4,941
Billings, MT
Mechanical to Electronic.


I <3 Red Line oil
Re: 5W-20 recommended in dodge 3.7? [Re: RageOfFury] #1749632
01/20/10 05:59 PM
01/20/10 05:59 PM
Joined: Feb 2009
Posts: 240
IL
JCM35 Offline
JCM35  Offline
Joined: Feb 2009
Posts: 240
IL
Originally Posted By: RageOfFury
I'm running GC in my 3.7 Liberty. Engine is loving this stuff. Easy starts, quieter, great protection. Screw CAFE and 5W-20. 5W-30 is what you should run in the 3.7 Powertech.

There is no way that you could do anything with your vehicle on the street that 5w20 could not handle. 5w20 great protection. There is noting that gc can do that PP, synpower, and M1 in a 5w20 weight could'nt do. Probably saving a little MPG with the thinner 5w20.

Last edited by JCM35; 01/20/10 06:00 PM.
Re: 5W-20 recommended in dodge 3.7? [Re: JCM35] #1749640
01/20/10 06:12 PM
01/20/10 06:12 PM
Joined: Nov 2009
Posts: 299
Ottawa, Canada
RageOfFury Offline
RageOfFury  Offline
Joined: Nov 2009
Posts: 299
Ottawa, Canada
Originally Posted By: JCM35
Originally Posted By: RageOfFury
I'm running GC in my 3.7 Liberty. Engine is loving this stuff. Easy starts, quieter, great protection. Screw CAFE and 5W-20. 5W-30 is what you should run in the 3.7 Powertech.

There is no way that you could do anything with your vehicle on the street that 5w20 could not handle. 5w20 great protection. There is noting that gc can do that PP, synpower, and M1 in a 5w20 weight could'nt do. Probably saving a little MPG with the thinner 5w20.

The only reason Chrysler recommends 5W-20 today in the 3.7L is because of CAFE. They are skipping on protection to offer 1-2MPG better fuel economy.

Better engine protection > Fuel economy IMO. 5W-30 all the way in the 3.7 and 4.7 for that matter. I run GC which offers even greater protection.

Last edited by RageOfFury; 01/20/10 06:13 PM.

2014 Jeep Grand Cherokee Limited V6 4x4
Re: 5W-20 recommended in dodge 3.7? [Re: RageOfFury] #1749643
01/20/10 06:15 PM
01/20/10 06:15 PM
Joined: Jul 2009
Posts: 11,194
Albany, NY
Nick R Offline
Nick R  Offline
Joined: Jul 2009
Posts: 11,194
Albany, NY
Originally Posted By: RageOfFury
Originally Posted By: JCM35
Originally Posted By: RageOfFury
I'm running GC in my 3.7 Liberty. Engine is loving this stuff. Easy starts, quieter, great protection. Screw CAFE and 5W-20. 5W-30 is what you should run in the 3.7 Powertech.

There is no way that you could do anything with your vehicle on the street that 5w20 could not handle. 5w20 great protection. There is noting that gc can do that PP, synpower, and M1 in a 5w20 weight could'nt do. Probably saving a little MPG with the thinner 5w20.

The only reason Chrysler recommends 5W-20 today in the 3.7L is because of CAFE. They are skipping on protection to offer 1-2MPG better fuel economy.

Better engine protection > Fuel economy IMO. 5W-30 all the way in the 3.7 and 4.7 for that matter. I run GC which offers even greater protection.


There isn't any worse engine protection with 5W-20 over 5W-30. Notice the Crown Victorias that surpass 300K miles on 5W-20 with no engine problems. The 3.7 and 4.7 are big enough gas hogs that even the tiny bit gained from the oil switch would help. Point me toward an incident where a car spec'ed for 5W-20 failed because the oil was too thin.

Re: 5W-20 recommended in dodge 3.7? [Re: Nick R] #1749653
01/20/10 06:23 PM
01/20/10 06:23 PM
Joined: Nov 2009
Posts: 299
Ottawa, Canada
RageOfFury Offline
RageOfFury  Offline
Joined: Nov 2009
Posts: 299
Ottawa, Canada
Both the 3.7 and 4.7 were engineered for 5W-30, not 5W-20. Like I said before, CAFE forced Chrysler to use 5W-20 in those engines to gain a few MPG but that sacrifices protection.

I'm not saying that 5W-20 is bad, it's just that if you want the best protection possible for the 3.7 or 4.7, stick to 5W-30 or 0W-30 or 10W-30 depending on your climate.

It's not the end of the world to use 5W-20, but I want the best protection possible for my engine.

Last edited by RageOfFury; 01/20/10 06:27 PM.

2014 Jeep Grand Cherokee Limited V6 4x4
Re: 5W-20 recommended in dodge 3.7? [Re: RageOfFury] #1749658
01/20/10 06:35 PM
01/20/10 06:35 PM
Joined: Jul 2009
Posts: 11,194
Albany, NY
Nick R Offline
Nick R  Offline
Joined: Jul 2009
Posts: 11,194
Albany, NY
Personal preference I guess, but if the manufacturer says its ok to use 5W-20 I'd use it, no real reason not to. The body and interior of your liberty will probably fall apart before the engine will- 5W-20 or not.

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