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Timmy
Dodge Dakota
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7/22/2003
06:56:27
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 Subject: Castrol 5W30 or M1 0W40?
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I am coming up on my first oil change. First meaning the first in my lifetime since I am 16 and have been driving only 3 months. My father uses Castrol and my brother uses M1. I haven't really been able to assess what the main differences are between Castrol 5W30 and M1 0W40, their pros and cons. Which is the best for my Dakota?
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Johnson
Dodge Dakota
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7/22/2003
07:05:33
| RE: Castrol 5W30 or M1 0W40?
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Let me say Castrol is not synthetic so you need to change your oil at 3k mile. M1 is synthetic, so you can push it to 5k with no problem. Synthetics are for those who would rather not be stuck under their car every 3k. Some people's time is worth more than $$$.
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AmsoilSponsor
DakotaEnthusiast
 
7/22/2003
09:16:43
|  Castrol 5W30 or M1 0W40 or Amsoil
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Timmy, I agree with Johnson regarding the following,
Castrol Syntec 5w-30 is NOT a REAL synthetic ... it is a Group III hydrocracked (dino) oil with some Group IV synthetic blended in. The Castrol is a "PRETEND" synthetic. Conversely, Mobil1 0w-40 IS a TRUE synthetic. Only oils manufactured with Group IV and Group V base oils are TRUE Synthetics.
Now on to your true needs.
FOR YOUR NEEDS ... Check your owners manual (or the oil fill cap) and use the viscosity recommended for your truck ... use Mobil1 and not Castrol.
Note: You asked about Mobil1 0w-40. For the record, Mobil1 0w-40 is a very good oil. Tell your family members that are using it that it is a good choice because I don't care much for Mobil1 0w-30. I know some vehicles that have had consumption issues with it. Not sure why. I like the specs of their 0w-40 better.
--------------------------------------------------
As usual, I would appreciate it if you would consider Amsoil. For a free catalog please click thru the following link.
Steven Roark , Amsoil Dealer , Proud Sponsor of www.DodgeDakotas.com
AMSOIL Synthetic Motor Oils, Lubricants, Filtration, and Truck Care Products
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Dr. D
Dodge Dakota
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7/22/2003
12:22:46
|  RE: Castrol 5W30 or M1 0W40?
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Timmy,
The best oil for your DAK in my opinion is the Amsoil which has been ordered on your Dad's bank debit card.
That leaves more money in your pocket that you can spend on the Women ;-)
Dr. D
p.s. By the way ... What year model Dak do you have and what engine do you have in it?
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fffff
Dodge Dakota
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9/07/2003
17:25:28
| RE: Castrol 5W30 or M1 0W40?
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Read this on another board.
Castrol Syntec is NOT a full synthetic no matter how they choose to advertise and decieve us. Actually, it might be depending on what definition you use for the word "synthetic." Castrol Syntec was reformulated in late 98. Before Syntec was reformulated, it was actually a full synthetic using a full synthetic base stock with PAO's just like Mobil 1 , Amsoil, and 90% of the synthetics out there. Once Syntec was reformulated in late 98, it was known that Syntec did not contain any PAO's. In fact, Syntec uses a Group III base stock which is a hydrocracked highly refined mineral oil with some synthetic additives. This is no secret, Mobil filed a complaint with the National Advertising Division of the Council of Better Business Bureaus alleging that Castrol was engaging in false advertising by claiming their Group III based Syntec was "fully synthetic." The NAD rulled that based on the evidence put forth, Group III base oil could legitmately be called "synthetic" ... even if they ARE NOT.
The NAD is merely a self-regulatory arm of the BBB and has no legal standing whatsoever in the U.S. Hence, their ruling in this matter does not make it "legal" to claim that a Group III oil is "synthetic." It merely means that for any entity willing to abide by the NAD's guidelines, a Group III oil can be ADVERTISED under those guidelines as a synthetic. The BBB certainly does not know motor oils.
If the base stock was a highly refined Group III base oil, then how could Castrol rightfully and legally call it a full synthetic? Unfortunately, Mobil lost the battle because of how the term "full synthetic" is defined by the API or SAE(can't remember which one). A full synthetic motor oil is defined on it's ability to perform, not by what it's made or composed of. The scam here, is that if a company takes a cheapa$$ dino oil, hydrocrack it, add a few synthetic additives, and it ends up meeting the minimum specifications of how a synthetic oil is supposed to perform, then the manufacturer is allowed by this vague and deceptive definition to sell and market thier oil as a "full synthetic!!!" If you guys like Castrol Syntec, that's fine because it's a good oil. But don't expect it to be a full synthetic oil composed of Diethers(Redline), or PAO's(Mobil 1, Amsoil, etc....)because it's not.
Castrol Syntec sells for $4 a quart around here, therefore if you would like an oil that is marketed as a full synthetic, yet is not a full synthetic, then you have many choices that cost a lot less. There was a controversy on thsi topic over on LS1 about 2-3 years ago over the Syntec issue, and Castrol not only threatened a lawsuit against a couple individuals and Amsoil as well, and they forced them to remove those articles that "exposed" the truth about Castrol Syntec.
...This is from a Ford truck message board I used to do a little browsing on.
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Anthony
Dodge Dakota
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9/07/2003
18:45:30
| RE: Castrol 5W30 or M1 0W40?
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I run Castrol Syntec in my Dak, I thought it was a full blend as it costs the same as other synthetics. I guess my next oil change I'm going Mobil 1 or Amsoil.
Anthony
www.geocities.com/dak2nv/
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PissedinVA
Dodge Dakota
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9/08/2003
09:22:49
| RE: Castrol 5W30 or M1 0W40?
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Message:
Well,
I looked for my post this morning and noticed that I posted in the wrong place. This was about quick lubes and Castrol/Mobil1 pricing. This is the right place (Castrol or M1) so I copied and pasted here. Sorry.
Well, I went to the quickie lube yesterday. Advertised $13.95 complete oil change (inc. filter) with 15 point check and free car-wash.
I asked the attendant what type of oil I got for $13.95, and he said that it came from the hose (pumped in) and he did not know what oil -- just the viscosity.
I told the attendant I wanted synthetic oil and he pointed at Castrol Syntec, and told me $5 per bottle -- wife's car and it held 5 qts. (5 qts. x $5 = $25). I knew Syntec was not 100% synthetic -- so I asked for Mobil1.
The attendant told me Mobil1 was $8 per bottle (5 x $8 = $40). I went with Mobil1 but when I got my bill it stated that I got a QuakerState oil filter. I asked the attendant and he said that QS filters were what they used and a Mobil1 oil filter would have been $15 extra. That would have put me at a $55 oil change + tax and tip = $60.
I was pissed. Good oil and bad filter for $40. Had I known and asked for M1 filter -- good oil and good filter would have cost me $60.
I asked the attendant if I could bring my own oil and filter nest time and he said yes. I asked what the charge would be and he said $10 if I supply the oil and filter. Next time I am going to go with the best. I have priced Amsoil and it comes to about $45 for the oil and filter (including tax and shipping) + $10 for the quickie lube to switch it out = $55. I can get the best and still save about $5 using Amsoil vs. Mobil1.
Make sure you know what you are getting first -- or you may get it up the bung-hole later.
Signed,
PissedInVA
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Dex
Dodge Dakota
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9/09/2003
10:44:54
| RE: Castrol 5W30 or M1 0W40?
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5w20 ????????????
Ok, call me paranoid but here is my opinion, and it is only an opinion.
I work for a police dept. Our new fords are requiring Motorcraft 5w20 synthetic oil. I can not believe that this is would be adaqute in protection of these engines. I know the drum beat is new engines and tighter tolerences, but come on. My girlfriends nissan maxima that has 125,000 says 10w40 is ok. Hmmm, how things have changed.
The cars are in a heated garage for winter, so there is no issue with start up lubrication, and they run constantly for the whole shift. You get what I mean.
How can a thin oil protect? Is this just sewing machine oil?
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AmsoilSponsor
DakotaEnthusiast
9/10/2003
12:30:56
|  Amsoil = American Synthetic Oil
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Dex,
The automobile manufacturers now recommend thinner oils for their vehicles than in the past. Thinner oils are being used these days because they save fuel in test engines. Years ago, SAE 10w-40 was the most commonly recommended viscosity grade, later migrating to SAE 10w-30. SAE 5w-30 is most popular now, but Ford and Honda recommend SAE 5w-20. It is likely that more widespread adoption of SAE 5w-20 and other thin oils may occur to help comply with CAFE requirements.
Because of the change in cold-flow requirements and the fuel economy test pushing formulators toward the bottom of the viscosity grade, today’s SAE 10w-30 oils are more like yesterday’s (GF-1 spec) SAE 5w-30 oils. On top of that, there is the trend toward automobile manufacturers recommending thinner grades.
This seems ridiculous.
SUVs and trucks, with their inherently less-efficient four-wheel drive and brick-wall aerodynamics, need powerful, gas-guzzling engines to move their mass around in a hurry. In response, auto manufacturers recommend using thin oils to save fuel. Incredible but True!
Thinner oils have less drag, and therefore less friction and wear. Right? Perhaps 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.
Steven Roark , Amsoil Dealer , Proud Sponsor of www.DodgeDakotas.com
AMSOIL Synthetic Motor Oils, Lubricants, Filtration, and Truck Care Products
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Dr. D
Dodge Dakota
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9/10/2003
20:17:38
| RE: Castrol 5W30 or M1 0W40?
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Steven,
I have been involved with racing for several years and most of the street rodders of today are using low viscocity synthetic lubricants instead of the 40wt and 50wt petroleum oils of yesteryear.
I have read that synthetic lubes offer up to eight times the film strength of petroleum oils when compared viscocity to viscocity (10w/30 petroleum v/s 10w/30 synthetic)etc.
Dr. D
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hh
Dodge Dakota
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9/13/2003
19:39:58
| RE: Castrol 5W30 or M1 0W40?
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Okay, I've seen the Castrol Syntech commercial now for the hump-teenth time. What the hell is the dino oil and how bad is it to SMOKE the engine in the test lab?
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GiveItUp
Dodge Dakota
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3/16/2004
11:26:58
| RE: Castrol 5W30 or M1 0W40?
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Castrol's recent TV commercial boasts, "Castrol Syntec Outperforms all leading motor oils". For those who didn't read the fine print, what they did was compare their "SYNTHETIC" oil against "NON-SYNTHETIC" oil. That's about as bad as Ferrari running a commercial and showing how faster their car is compared to a Hyundai Excel! PATHETIC!
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jeremiah2360
Dodge Dakota
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3/16/2004
16:53:55
| RE: Castrol 5W30 or M1 0W40?
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FWIW, Motorcrafts 0-20 oils are putting up great numbers in oil analysis results.
http://theoildrop.server101.com/ubb/ultimatebb.php?ubb=forum;f=3
Also, Mobils new SUV oil is the same as their Delvac(sp)1. Delvac 1 is considered by many to be Mobils best oil,previously only available in bulk. The SUV (Delvac 1) 5-40 would be a great year round oil. I`d assume it would be more shear stable than the 0-40 as well.
03 qc 4.7 auto 4x4 28k
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00R/T CC
Dodge Dakota
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3/16/2004
18:28:56
| RE: Castrol 5W30 or M1 0W40?
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Haven't come across the M1 5w40 around here, has anyone seen it at a Wal-Mart or...?
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Jim
Dodge Dakota
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3/16/2004
18:44:24
| RE: Castrol 5W30 or M1 0W40?
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A little off the subject. Has anyone had problems with oil filters leaking on the 4.7 Dakota? Thanks.
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jeremiah2360
Dodge Dakota
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3/16/2004
22:52:18
| RE: Castrol 5W30 or M1 0W40?
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The SUV 5-40 will be available "early spring 2004" according to Mobils web site.
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spt
Dodge Dakota
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3/16/2004
23:18:31
| RE: Castrol 5W30 or M1 0W40?
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I have a 1988 Dakota and it has had nothing but Castrol 10w30. It is coming up to 300,000 km and runs great and does not use any oil between changes.
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CharlieP
Dodge Dakota
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3/17/2004
06:19:29
| RE: Castrol 5W30 or M1 0W40?
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jeremah
You send us a link to an oil analysis site for
used oil and then tell us that the oil you mentioned
is not even available and on the market ???!!!
It don't make sense.
My .02, the jury is still out on the mobil 5W-40.
So far from what I read it holds up best in
the 4 cylinder suv's and the turbo suv's.
Don't come to papa monkey with plastic banana's.
I been in the engine rebuilding biz for 17 yrs.
And I use Delvac, Amsoil, and Schaeffers. I know my facts.
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jeremiah2360
Dodge Dakota
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3/17/2004
06:40:24
| RE: Castrol 5W30 or M1 0W40?
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Charlie,the link I provided was intended for the 0-20 putting up great numbers.
The SUV 5-40 is Delvac 1, and will be available soon.
Sorry if I confused you or anyone else.
Your statement of the Mobil 5-40 could be misleading as well. Is this the 5-40 thats not available yet? See what I mean. Don`t be so judgmental.
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CharlieP
Dodge Dakota
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3/17/2004
08:38:09
| RE: Castrol 5W30 or M1 0W40?
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Mobil 1 0W-20 isn't the only 20 wt showing good wear. Mobil 1 20 wt is closer to a 30 wt. They come in just under the 30 wt to get the 20 wt market share. I would not recommend this oil be used by everyone, but it definitely works well in Ford and Honda engines (higher reving 4 cylinders, for CAFE and to increase the MPG) which call for 5W-20. Like I said, I think it is actually a weak 30 wt. and that is why it performs so well. The key is using the 20 wt in vechiles that specifically call for it. Be it 5W-20 or 0W-20. I have been using Amsoil 0W or 5W-30 full synthetic. Even the manufacturers that recommend a 20 wt. say you can use the 30 wt. Fuel efficiency with the 30 wt. won't be as good, but wear protection should be even better.
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CharlieP
Dodge Dakota
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3/17/2004
08:39:07
| RE: Castrol 5W30 or M1 0W40?
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oh yea
the jury is still out on the 5W-40
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