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21:42:15 - 04/18/2024
V6 Dakotas
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skywarrior
GenI
3/03/2008
22:08:42
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 Subject: 5W-15??
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Message:
I just picked up my 2007 Dakota. The owners mannual says to use 5W-15 oil. Neve have use oil this thin. Has anyone used this oil or had any trouble with it? I guess it would be good in cold weather but wonder about it when it is hot.
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dakota49
Dodge Dakota
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3/08/2008
20:50:54
| RE: 5W-15??
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Message:
There are a lot of new thinner oils, I think the biggest reason is with new machining methods the factories can keep the clearences tighter than they use to, plus the thinner oil will help get better gas mileage, I would think if Dodge says to use it, I would go ahead and use it, just be sure to keep track of your oil changes so if you have a problem you can prove you did regular maintance. I wouldn't worry about if it were mine though, like I said, if Dodge says use it I would.
Good Luck
Dakota49
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N56629
Dodge Dakota
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3/08/2008
23:15:09
| RE: 5W-15??
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I can see 5w-20 5w-30 or even 0w-30 but I don't know why they would recommend 5w-15. Is that a winter recommendation or year-a-round?
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Steven Roark
Dodge Dakota
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3/09/2008
16:26:43
| RE: 5W-15??
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You know, sometimes the obvious answer is the easiest answer and that is why I recommended you stick with 5w-20 ... but now I have given it more thought and have additional comments. That and the fact '02DAK mentioned a Town and Country.
KEEP THE FOLLOWING STATEMENT IN MIND WHEN READING BELOW
*** Increased fuel economy when using a 5w-20 compared to a 0w-30, 5w-30 or 10w-30 viscosity motor oil is *** VIRTUALLY UNDETECTABLE *** to the average motorist. ***
_________________________________________________
One of the main reasons 5w-20 was specified for your engines (Honda and Ford -- and even Daimler-Chrysler) is to increase the CAFE (Corporate Average Fuel Economy or the combined average fuel economy of ALL of a vehicle manufacturers product line). Auto manufacturers faces big fines if the fleet of cars/trucks it produces falls short of the CAFE requirements imposed upon them by the federal government. When you average millions of vehicles the report might indicate a “slight“ increase in CAFE … but it is *** VIRTUALLY UNDETECTABLE *** with just one test vehicle.
FRICTION AND WEAR RISKS … for the small increase in CAFE?
5w-20 oil is a lighter viscosity oil and therefore has less internal engine frictional losses, or less drag on the crankshaft, pistons and valvetrain, which in turn promotes increased fuel economy – but only a very slight increase.
Do thinner oils have less drag, and therefore LESS FRICTION and WEAR? ... PERHAPS NOT. Maybe in the test engine or engines that experience normal operation. But somewhat thicker oils may offer more protection for more severe operations such as driving through mountains, pulling a boat, dusty conditions, short trips, high rpm, overloading, overheating and overcooling. REMEMBER THIS WHEN YOU MAKE A VISCOSITY DECISION. 5w-20 may be a SHORT TERM solution to automakers CAFE concerns. As wear increases, the efficiency of an engine declines. Valve train wear slightly changes valve timing and movement. Ring and liner wear affect compression. LONG TERM the wear hurts fuel efficiency and power output. Efficiency continues to decline as wear progresses. Perhaps optimizing wear protection is the way to reduce fuel consumption over the life of the engine ... the LONG TERM.
Just something to think about.
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IN CONCLUSION: We recommend 5w-20 for vehicles that call for a 5w-20. However there are customers using AMSOIL Series 2000 0W-30 Severe Service in this application with excellent results.
Steven Roark , Amsoil Dealer , Proud Sponsor of www.DodgeDakotas.com
AMSOIL Synthetic Motor Oils, Lubricants, Filtration, and Truck Care Products
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Steven Roark
Dodge Dakota
JOIN HERE
3/09/2008
16:28:44
| RE: 5W-15??
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Thank you Kowalski.
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The Importance of VISCOSITY
All metal engine parts need to be separated from each other while moving in order to prevent friction and wear on the parts. This in done in modern production engines using a thin film of oil (usually less than 1/10,000 of an inch thick). Oil’s viscosity, in part, determines how thick a film the oil will form between moving parts, and how much friction there will be between those parts when separated by the oil.
WARNING (or A WORD OF CAUTION)
Higher viscosity means thicker oil films and more friction within the oil. Obviously, one wants a viscosity high enough to prevent parts from grinding against each other, but no higher than that, because any more results in excessive friction within the oil, leading to excess heat and power loss. The ideal oil would provide the minimum required viscosity under all conditions.
For more information on VISCOSITY visit this thread:
http://dakota-durango.com/forum/showthread.php?t=12765
(sorry, but you have to copy and past because html is disabled)
_________________________________________________
Thank you and I hope this helps everyone.
Steven Roark , Amsoil Dealer , Proud Sponsor of www.DodgeDakotas.com
AMSOIL Synthetic Motor Oils, Lubricants, Filtration, and Truck Care Products
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