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JeffRedmond
Dodge Dakota


10/02/2001
18:46:17

Subject: Motor Oil weight?
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Hey guys,
The last time I changed my oil, which was an absolute mess thanks to the stock fake skidplates, I put 5W 30 mobil1 trisynthetic in. It runs fine. I'm wondering, should I be using a different weight? I thought maybe with the less weight my engine wouldn't have to work as hard to move which in turn gives a touch more performance? Logic logic logic. Any ideas?

2K QC 4x4 4.7



Clevite 77
Dodge Dakota


10/02/2001
23:46:56

RE: Motor Oil weight?
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A year ago I worked at a Chrysler dealer and just before I quit I did an oil change on a nice 5.2L 4x4 and I didn't think much of the skidplate and like you mentioned oil was everywhere, a simple oil change just became a nightmare, I had to remove the skidplate clean it and put it back on. As for your oil question; I think your using to light of oil right now, unless it's freezing cold were your at, the oil could breakdown if exposed to extreme heat, and your bearings won't last, if want to go faster do a real mod like exhaust, intake cam, etc. You are right thought the thinner oil will have smaller molocules to move around, giving you maybe fractions-a couple of hp, but it's not worth the protection of 10W30 or higher.
hope this helps



MAD DUC
Gen III
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10/03/2001
06:40:05

RE: Motor Oil weight?
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I would stick with the 5w-30. At least with the 4.7,being "new" the clearances designed into it a 5-30 is fine. I put an Auto-Meter gauge in and at cold start-up oil pressure is around 90psi. A slight increase in rpm's pegs the needle at 100psi. Even when fully warmed up idle oil pressure is at 40psi,cruising 75-80psi and WOT playing 95psi. More than enough pressure.



JeffRedmond
Dodge Dakota


10/03/2001
12:21:37

RE: Motor Oil weight?
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Thanks guys.



Hatterasman
Dodge Dakota
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5/20/2002
15:14:10

RE: Motor Oil weight?
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I appreciated reading this thread...was unsure about what weight to run in my '01 4.7L...How about tire pressure in the factory rim Goodyear Wrangler P265/70 r16s?? The plate in my door opening is stamped for 15" wheels and the owner's manual is kinda ambiguous. My truck is a CrewCab 4X4 SLT Thanks for any info./advice Please email me @ krod3mta3@aol.com
Thanks
Calvin Wright
Hatteras, NC



BlackDak02
*GenIII*
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5/20/2002
15:43:23

RE: Motor Oil weight?
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Thanks for that info MAD DUC. I dislike 'one step up from idiot light factory gauges', LOL. I plan on installing a pod over the A-pillar with real guages. I am currently running Mobil1 10/30, but will go back to 5/30 with this information. Definitely plenty of pressure.



2002 Black CC SLT 4x4
4.7L 45RFE 3.55 LSRD


Art
Dodge Dakota
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5/20/2002
16:23:54

RE: Motor Oil weight?
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Stick with the 10w30 it keeps slightly higher pressure when engine is fully warmed up,the viscosity ratings of oil have more to do with what the usual outside temp is in your area than anything else.If it rarely gets below 20* F and hotter than 80* F in your area I would stick with 10w-30



Dave Mitchell
Dodge Dakota
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5/20/2002
17:43:05

RE: Motor Oil weight?
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Factory service manual states 5W-30 is preferred, but if the temperature never drops below 0 degrees and if it goes above 100 degrees, then use 10W-30.

The temperature where I'm at never drops below 0, but it does get above a 100, so I am using 10W-30.



Mr Obvious
Dodge Dakota
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5/20/2002
18:34:25

RE: Motor Oil weight?
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iif its hot out use 5 W 40 ... in winter 5 W 30



sandman
Dodge Dakota
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5/20/2002
18:40:46

RE: Motor Oil weight?
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According to mopar magizine the only part of the 4.7 that is specificly clearanced for 5w30 is the oil pump. THe bearing cleareances are not that much different then the old LA engines. 2001 Service Manual 0-5 figure 5 lists 10w30 as prefered weight for our Dak while figure 4 lists 5w30 as prefered. 5W30 only shows up as prefered if temps are expected to fall below 0 degrees F!!!! This engine will run on 15w50 to 5w30 no problem.



kevster
Dodge Dakota
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5/20/2002
19:27:40

RE: Motor Oil weight?
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The Dealer uses 10w-30 wt when i take mine in for an oil change, sometimes i get lazy and let them do it, but when i do the oil change myself i use 5w-30 wt . The 10-30 is just fine also. The book (owners manual)lists to use 5w-30 wt for Optimum fuel mileage..



Todd Bouton
Dodge Dakota
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5/20/2002
21:32:46

RE: Motor Oil weight?
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Hey Jeff,

the 'trisynthetic', may not be a pure true synthetic, you know that right? It seems this processed dino oil can also be called synthetic.

Hey guys, is the mobil 1 tri syn. really a synthetic? I use Mobil 1, but I didn't think it says trisynthetic.
























jdak
Dodge Dakota
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5/28/2002
08:23:23

RE: Motor Oil weight?
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Real synthetic is Amsoil...10w30. Use amsoil filters and oil. Change every 25,000 miles.
Change filter at 12,500.
No problem 84,000 miles 97 dak. Runs cooler and smoother.
Amsoil also has a synthetic trans fluid.
None of these products are dependant on the Arabs...
Try it you will like it.
Jdak



Rafael Ruiz
Dodge Dakota
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5/28/2006
06:47:11

RE: Motor Oil weight?
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Dodge Dakota 2003.



MadMason
Dodge Dakota
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5/28/2006
08:53:20

RE: Motor Oil weight?
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I'm using Mobil 1 5W-30 in my 98 3.9 and it runs great. Before it had dino oil in it and i could make out a difference in the oil pressure reading at all. So it seems all good.



Obio3
Dodge Dakota
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5/28/2006
20:34:17

RE: Motor Oil weight?
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Sandman hit the nail on the head.... The pump is the true desiding factor in oil viscosity assuming your engine is in reasonable condition. It is the gear clearences and gear size in the pump that allow it to pump the thinner oil at the desired pressures and the relief pressure spring that controls it. As your engine wares in time the spring just doesn't start to open up as soon allowing pressure to stay up nicely. The pump will increase clearance to with time and eventualy everything has wore to the point the pressure spring can no longer keep up unless running higher RPMs. Higher viscosity comes into play then untill she blows or you rebuild it. Long way down the road to that point with proper care. Also, thinner oils pass through the engine faster helping a bit better in cooling the engine. There's a lot of people that have no clue the oil is part of the cooling system.

So many problems .... So little time



Cranky
Dodge Dakota
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6/02/2006
00:27:45

RE: Motor Oil weight?
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Once upon a time I was a Die Hard "Mobil 1" fanatic. 15K between oil changes and not even blinking an eye. When my 4.7 Dak was new, I ran 0W30 without a worry, Around 40K I started with 5W30. Shortly thereafter Exxon-Mobil corporation really pissed me off with thier Greed. I will no longer purchase anything that has a connection with Exxon-Mobile Corporation. Something about screwing the entire American Economy on thier way to making a record 139 BILLION dollar profit last year!

About 55K I switched over to Amsoil 10W30 and with the last Oil change now that I'm at 97K I went with 10W40 and will likely run that until I kill it. It does have a factor on where you live too, I'm in Central TX where the highway temps push 120 just above the asphalt from June-Sept and during the summertime I'm either towing my 5K# boat & trailer or my 4K# camper around.

My old '93 Dak 3.9 I was running Mobil 1 20W50, of course it was over 200K miles and that was the only thing that would keep the oil pressure above 0 while idling at a traffic light. (yes I tried 3 different oil pumps first).

Just my 2c



NotSmart
Dodge Dakota
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6/06/2006
00:03:13

RE: Motor Oil weight?
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I drove a 65 chevy truck when I was in high school....it had a straight six (231 cubic inches). It burn't more oil than gas so I put two containers of "Motor Medic" in with the oil. It quit smoking but it wouldn't have any oil pressure for about 15 seconds....NotSmart.



Rafael Ruiz
Dodge Dakota
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6/06/2006
13:49:29

RE: Motor Oil weight?
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DODGE DAKOTA 2003!!!!!!!!
_________________________



Old Dak
Dodge Dakota
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6/06/2006
14:07:35

RE: Motor Oil weight?
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Don,tget caught with oldschool thinking about oil, with an overhead cam engine. When ford came out with its 4.6, They lost alot of engines because people would run thir old standby 10-40. The problem came when the temps dropped.(even just into the upper 30,s) the oil would not get to the cams and followers in time to keep from wiping them out. They,ve improved on that-but sudden temp drops can still hurt a cammer with heavy oil.



Old Dak
Dodge Dakota
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6/06/2006
14:09:05

RE: Motor Oil weight?
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Don,tget caught with oldschool thinking about oil, with an overhead cam engine. When ford came out with its 4.6, They lost alot of engines because people would run thir old standby 10-40. The problem came when the temps dropped.(even just into the upper 30,s) the oil would not get to the cams and followers in time to keep from wiping them out. They,ve improved on that-but sudden temp drops can still hurt a cammer with heavy oil.



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