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23:31:18 - 12/19/2024
V6 Dakotas
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Big Dave
Dodge Dakota
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4/22/2004
12:50:10
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 Subject: Motor Oil Questions
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Hey guys. I have some questions about motor oil. What is the difference in the motor oil with different numbers? Call me stupid, but I really don't know. I know that 10w-30 is 10 weight. I know that 5w-30 is 5 weight. But then there is 10w-40 and 5w-40. What do the different weights mean? What is the advantage of either one. What do the 30's and 40's mean?
I really don't know. I would like to educate myself though, so if you can help me become a better educated Dakota driver, I would appreciate it.
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Bob Lincoln
Dodge Dakota
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4/22/2004
13:06:26
|  RE: Motor Oil Questions
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The first number is its "cold" viscosity and the 2nd is its "warm" viscosity. By being multi-weight, an oil can protect the engine better, giving it lower viscosity and better flow (less friction, less bypass time of the oil filter) when cold, and good viscosity when warm so it isn't too thin to protect the engine at higher temps and carry the load on the bearings.
So for the first number, the lower the number, the colder you can run the engine (O F for 5W-30, 32F for 10W-30), and the higher the 2nd number, the higher the ambient temperature you can run without the oil breaking down, losing viscosity.
I have seen articles stating that oils with more than a difference of 20 will not hold up as long without breakdown of the long-chain molecules, therefore it's better to choose a lighter oil for winter and another for summer rather than keep one type year-round.
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?
Dodge Dakota
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4/22/2004
14:43:54
| RE: Motor Oil Questions
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Where is Mr. Amzoil ?
Synthetic is even better ...
But if staying with normal oil , better to
stay with lower " high " number
I.E 10W30 not 20W50
unless engine is badly worn
although then it is better to get it rebuilt
or replaced .
Only exception is maybe if you are living/driving
in Mexico ( continual High Temperatures..
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Bob Lincoln
Dodge Dakota
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4/22/2004
15:34:47
| RE: Motor Oil Questions
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I switched to synthetic on my 2.5L in 1997, as it was showing signs of the so-called piston slap noise. It would knock below about 20F for the first few miles, between 1500 and 2000 RPMs. Switching to Mobil One synthetic 5W-30 completely eliminated it, and it's gone over 100K miles more so far. I did find that it does not swell the seals as much as conventional oil, so older engines will leak a little more (1200-1500 miles per quart now instead of 2000). However, switching back to conventional (which I tried briefly) fixes the oil consumption, but brought back the noise. Back to syn, no more noise.
Synthetic also makes it much smoother running and faster, better starting when very cold, and smoother in general. A little more cold power.
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J-Man
Dodge Dakota
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4/22/2004
15:46:22
| RE: Motor Oil Questions
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Bob,
What is piston slap?
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Bob Lincoln
Dodge Dakota
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4/22/2004
16:09:05
| RE: Motor Oil Questions
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Piston slap refers to the condition and noise whereby the engine's cylinder walls become slightly oval over time through wear, and the piston "slaps" sideways slightly as it travels up and down. It produces a knocking noise just a little less than bearing knock. As the engine heats up and expands, it tends to lessen. The 2.2L and 2.5L engines were said to be very susceptible to this. I thought I had this condition, but the syn oil made the noise go away. Since I change oil and filter every 3K miles, it wasn't a case of neglect or dirt.
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AmsoilSponsor
DakotaEnthusiast
4/22/2004
17:05:05
|  Viscosity, Amsoil = www.american-synthetic-oil.co
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VISCOSITY .. in the general term is defined as " a fluids resistance to flow". it's a measure of the internal friction of the fluid or the resistance to the movement of one layer of molecules relative to an adjacent layer.
THE LOWER (SMALLER or FIRST #, as in "10w-_) NUMBER.. is the Cold Cranking measurement, made at low temperatures, using a concentric cylinder viscometer to predict the oils cranking resistance in an engine during cold starting.
The measuring devices, or viscosmeters, most often used are in the form of close-fitting concentric cylinders. The fluid being evaluated is placed between the cylinder walls, the outer cylinder is held stationary and the inner cylinder is rotated. The speed of rotation is measured for a given force to calculate the viscosity, most commonly reported in cp or centipoise units. Also known as Absolute Viscosity.
THE HIGHER (BIGGER or SECOND #, as in "-30") NUMBER...is commonly measured in capilary tubes, in which the time for a fixed volume of fluid to flow through the tube under gravity at operating temp (100c)is measured and reported as cSt or centistokes. This is used most commonly to report the normal operating viscosity of motor oils or the higher number.
" __W- " is a viscosity GRADE, not a viscosity MEASUREMENT.
When testing for cold fluidity, the temperature is lowered approximately 5 degrees centigrade between each test.
The Cold Crank Simulator Apparent Viscosity is tested at:
-20 C for 10W-
-25 C fpr 5W-
-30 C for 0W-
It is my understanding that the oil has to be labelled at the lowest temperature it meets the specifications.
It may not be long before someone comes out with a " -5W-30 " which would correspond with -35 C.
__________________________________________________
Steven Roark , Amsoil Dealer , Proud Sponsor of www.DodgeDakotas.com
AMSOIL Synthetic Motor Oils, Lubricants, Filtration, and Truck Care Products
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AmsoilSponsor
DakotaEnthusiast
4/22/2004
17:09:43
| Amsoil = www.american-synthetic-oil.com = Amzoil
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Which Oil --- for the Dakota?
Amsoil SAE 5w-30 or Series 2000?
Most visitors to this site know how I feel about Amsoil Series 2000. Amsoil's SAE 5W-30 or 10W-30 Synthetic Motor Oils are excellent oils and have shown to be almost the same quality as the Series 2000. IMHO ... Amsoil 10w-30 gives you the best bang for $$$, and it is the oil I use.
Amsoil Series 2000 0w-30 is the more shear stable of the two Amsoil formulations (Series 2000 vs. SAE). The Series 2000 also reduces friction (better gas mileage -- fuel savings of approx 2%-3% in comparison to the 10w-30 in short trip driving), protects from heat and wear better, better engine cleanliness than the 5w-30 and 10w-30 due to higher detergency, better cold weather performance --- in any high performance application, --- and will provide the lowest oil consumption in older vehicles that are experiencing oil consumption problems.
Special note: Amsoil Series 2000 0w-30 can be used to in place of 5w-20/5w-30/10w-30 oils. I'd even recommend it in engines that come with 0w-40 or 5w-40 grades.
Either oil is fine. I use the less pricey of the two. If you drive your truck "hard" --- you might be happier with your choice of the Series 2000.
How about that. A salesman not trying to talk you into the higher priced oil ; - )
__________________________________________________
Steven Roark , Amsoil Dealer , Proud Sponsor of www.DodgeDakotas.com
AMSOIL Synthetic Motor Oils, Lubricants, Filtration, and Truck Care Products
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Ronder
Dodge Dakota
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4/22/2004
18:33:11
| RE: Motor Oil Questions
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Good post Steven....
? for U.....
The Series 2000 reduces friction (better gas mileage -- fuel savings of approx 2%-3%....
My Dakota I get, let's say 20 mpg...+ 2% if I use the 2000 amsoil= .4 ... X 20 gallons = 8 miles more per tank... at three tanks I get a free gallon of gas....at $1.75 a gallon ... the price difference in the Amsoil's SAE and 2000 pays for it self pretty fast... Plus the 2000 it better oil...
Am I right ?
What is the drain milage on the 2000 in a v6 Dakota? with the 2000 oil?
Thanks, Ronder
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AmsoilSponsor
DakotaEnthusiast
4/23/2004
02:28:44
| Amsoil = www.american-synthetic-oil.com = Amzoil
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SERVICE LIFE --- Amsoil Series 2000
Amsoil Series 2000 is our longest drain interval synthetic oil. In personal cars and light-duty trucks with non-turbocharged gasoline engines --- believe it or not --- it is Amsoil's recommendation that you can change the oil at 35,000-mile or one-year intervals, whichever comes first. This is for NON-SEVERE SERVICE and highway miles --- and changing the filter every six months (not just for filtration purposes --- but it also serves to top-off the additives with "one new fresh quart of oil").
Personally, and acording to Amsoil, for regular driving under normal conditions ( a combination of city and highway) --- you can change the oil at intervals between two to three times longer than recommended by the engine manufacturer -- or once every six months, whichever comes first.
In high performance and racing engines -- or if you drive your Dakota really HARD (all stop and go city traffic and/or like a maniac) -- oil change intervals should be shorter or use Oil Analysis fto determine longer drains.
AMSOIL Oil Filters should be changed at 12,500-mile or six-month intervals (whichever comes first) in gasoline engines.
Steven Roark , Amsoil Dealer , Proud Sponsor of www.DodgeDakotas.com
AMSOIL Synthetic Motor Oils, Lubricants, Filtration, and Truck Care Products
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AmsoilSponsor
DakotaEnthusiast
4/23/2004
03:10:42
| Amsoil = www.american-synthetic-oil.com = Amzoil
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A couple of tips to pick up the best results with long drain synthetic lubes (borrowed from a guy with over 25 years in the industry):
1) Start with a clean engine - use the Amsoil engine flush if the engine has over 30k miles using petroleum oil. For high mileage engines, I now highly recommend the use of AutoRX (www.auto-rx.com). Use a double treatment if the engine is really dirty.
2) Make sure you aren't getting abnormal contamination, particularly from coolant, silicon or fuel. Do an oil analysis BEFORE putting the expensive synthetic in and trying to run a long change interval. A significant coolant leak can cause the oil to badly sludge up in 2k-3k miles and destroy the main bearings.
3) Tune the engine on a regular basis - this includes things like changing PCV valves and oxygen sensors and servicing EGR valves where required. A poorly running engine produces abnormal rates of oxidation and nitration.
4) Flush and refill the coolant every few years - If the engine is running hot from a clogged cooling system, the oil will oxidize more quickly.
5) Use an effective fuel injector cleaner on a regular basis, at least 1-2 times a year. I've had excellent results with the Amsoil Performance Improver. Chevron "techron' is probably one of the best off the shelf cleaners.
6) New vehicles -- Get at least 10,000 miles on the engine before running a long drain interval. New engines don't have a very good piston ring seal and there is too much wear in the first 10k miles to keep the oil in for long periods. Go 5k-6k on the motor before using a synthetic for the first time and limit the first Amsoil change to 7,500 miles after that.
On the rare occasions where he sees problems with Amsoil and extended drains, it is generally due to one or more of the above reasons ....
*** REMINDER *** Amsoil's typical extended drain is “ONE YEAR – OR - 25,000 MILES”, which ever comes first, with an oil filter change at the 6 month interval. I think many people forget this.
__________________________________________________
Steven Roark , Amsoil Dealer , Proud Sponsor of www.DodgeDakotas.com
AMSOIL Synthetic Motor Oils, Lubricants, Filtration, and Truck Care Products
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03SXT
Dodge Dakota
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4/23/2004
20:54:55
| Valvoline
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i use Valvoline Synpower 10w30
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