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P Y E
Dodge Dakota
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12/22/2005
14:54:56
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 Subject: Oil Weight
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Message:
So what does it matter if I use 10w40 when it says to use 10w30
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Branson
Dodge Dakota
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12/23/2005
13:59:18
| RE: Oil Weight
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Message:
Depends.
Same brand oil?
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Red99DakR/T
Dodge Dakota
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12/23/2005
16:59:58
| RE: Oil Weight
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Message:
The 10w40 is formulated for warmer weather. Using the 10W40 may cost you in gas milage and, if you are in a cold weather state, cause some of the engine parts that need oil, not to get oil as fast upon start up. Don't know how many miles are on your truck, but if you are under 100k, I would consider using 5W30, expecially in the cold. Personally, I like using the synthetics. Presently I am trying out AMSOIL and have been pleased so far. I hope I helped.
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AmsoilSponsor
DakotaEnthusiast
12/27/2005
09:00:59
|  Oil Weight - Steven Roark Amsoil Dealer # 1061837
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Message:
A higher viscosity motor oil (10w-40 vs. 10w-30) can translate to a greater load on the pumping system, and pumping losses through the passages, bearings, and even the filter.
Theoretically, that results in less power and lower fuel efficiency (lower MPG). A 10w-40 motor oil will rob you of gasoline mileage ... typically 2% - 3% less MPG ... than a 10w-30.
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Information:
The first number in a viscosity rating (viscosity grade actually) indicates cold start viscsity (the w stands for "W"inter) ... and both are a "10w-". If you live in an extreme winter climate, you might want to consider a "5w-" or a "0w-" oil for improved cold starts.
The second # ("-40") is the warm (operating temperature) viscosity grade (approx. 10 minutes after starting).
There are some reasons however that a person might consider a thicker oil. A "thicker" 40 wt. oil vs a "thinner" 30 wt oil would be considered only if you seeking higher oil pressure readings for some reason, because the seals are leaking, or for some reason the engine does not like a 30 wt. oil (engine noise). FYI ... A 10w-40 is a "10w-" when cold and a "40 wt." when it hits operating temperature (approximately 10 minutes after stating).
A healthy (well maintained) engine, still within tolerance, can maintain sufficient oil film strength with "lower viscosity fluids" vs. "higher viscosity fluids" ... which has many more advantages than switching to a heavier weight oil.
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AMSOIL Synthetic Motor Oils, Lubricants, Filtration, and Truck Care Products
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Ricky Sox
Dodge Dakota
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10/10/2012
17:22:37
| RE: Oil Weight
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Message:
I own a 2005 Dodge Dakota. I do not have an owners manual. 4.7 V-8 engine. There is a tapping noise when the motor starts cold. I live in SC and do not experience extremely cold weather. What weight oil is recommended?
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