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#1743112 - 01/14/10 05:59 PM 5W-20 recommended in dodge 3.7?
Buick92 Offline


Registered: 07/19/05
Posts: 623
Loc: 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.

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#1743119 - 01/14/10 06:02 PM Re: 5W-20 recommended in dodge 3.7? [Re: Buick92]
zrxkawboy Offline


Registered: 11/30/04
Posts: 1770
Loc: 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


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#1743126 - 01/14/10 06:05 PM Re: 5W-20 recommended in dodge 3.7? [Re: zrxkawboy]
tig1 Offline


Registered: 01/03/09
Posts: 13723
Loc: Illinois
Both of my engines call for 5-20 but use either 5-20 or 5-30 with equal good results.
_________________________
2007 Ford Fusion 228,000 miles
M1 0-20 EP
2017 Ford Fusion 52K
M1 0-20 EP
10,000 mile OCIs on both engines
M1 ATF and MC LV
M1 10-30 in all OPE
MC filters


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#1743337 - 01/14/10 08:33 PM Re: 5W-20 recommended in dodge 3.7? [Re: tig1]
beast3300 Offline


Registered: 12/24/09
Posts: 3171
Loc: 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

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#1743354 - 01/14/10 08:41 PM Re: 5W-20 recommended in dodge 3.7? [Re: beast3300]
RageOfFury Offline


Registered: 11/15/09
Posts: 299
Loc: 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

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#1748610 - 01/19/10 06:47 PM Re: 5W-20 recommended in dodge 3.7? [Re: RageOfFury]
artificialist Offline


Registered: 09/23/07
Posts: 8598
Loc: 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

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#1748637 - 01/19/10 07:02 PM Re: 5W-20 recommended in dodge 3.7? [Re: artificialist]
RageOfFury Offline


Registered: 11/15/09
Posts: 299
Loc: 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

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#1749044 - 01/20/10 07:30 AM Re: 5W-20 recommended in dodge 3.7? [Re: RageOfFury]
mdocod Offline


Registered: 07/06/05
Posts: 624
Loc: 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.

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#1749062 - 01/20/10 08:02 AM Re: 5W-20 recommended in dodge 3.7? [Re: mdocod]
RageOfFury Offline


Registered: 11/15/09
Posts: 299
Loc: 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


Edited by RageOfFury (01/20/10 08:02 AM)
_________________________
2014 Jeep Grand Cherokee Limited V6 4x4

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#1749453 - 01/20/10 02:37 PM Re: 5W-20 recommended in dodge 3.7? [Re: RageOfFury]
chevrofreak Offline


Registered: 06/17/05
Posts: 4941
Loc: Billings, MT
Mechanical to Electronic.
_________________________
I <3 Red Line oil

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#1749632 - 01/20/10 05:59 PM Re: 5W-20 recommended in dodge 3.7? [Re: RageOfFury]
JCM35 Offline


Registered: 02/01/09
Posts: 240
Loc: 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.


Edited by JCM35 (01/20/10 06:00 PM)

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#1749640 - 01/20/10 06:12 PM Re: 5W-20 recommended in dodge 3.7? [Re: JCM35]
RageOfFury Offline


Registered: 11/15/09
Posts: 299
Loc: 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.


Edited by RageOfFury (01/20/10 06:13 PM)
_________________________
2014 Jeep Grand Cherokee Limited V6 4x4

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#1749643 - 01/20/10 06:15 PM Re: 5W-20 recommended in dodge 3.7? [Re: RageOfFury]
Nick R Offline


Registered: 07/14/09
Posts: 11193
Loc: 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.
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2019 VW Jetta SE 1.4T/8 speed auto/Factory Fill 0W-20/<1,000 miles

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#1749653 - 01/20/10 06:23 PM Re: 5W-20 recommended in dodge 3.7? [Re: Nick R]
RageOfFury Offline


Registered: 11/15/09
Posts: 299
Loc: 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.


Edited by RageOfFury (01/20/10 06:27 PM)
_________________________
2014 Jeep Grand Cherokee Limited V6 4x4

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#1749658 - 01/20/10 06:35 PM Re: 5W-20 recommended in dodge 3.7? [Re: RageOfFury]
Nick R Offline


Registered: 07/14/09
Posts: 11193
Loc: 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.
_________________________
2019 VW Jetta SE 1.4T/8 speed auto/Factory Fill 0W-20/<1,000 miles

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