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20:41:42 - 04/26/2024
V8 Dakotas
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99bludak
Dodge Dakota
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7/23/2004
14:06:12
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 Subject: Synthetic problems?
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Ok, with all these posts about synthetic, I have a question about something I have heard several times. I have been told by many that switching to a synthetic after 50k will cause many seals to leak since the synthetic is thinner. Is this true? I would like to get the improved performance of a synthetic but I have 57k on my 99 and don't want to end up with leaks all over. Any input is appreciated.
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.boB
Dodge Dakota
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7/23/2004
17:15:04
|  RE: Synthetic problems?
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That used to be a problem. Not because the oil is thinnner, because it isn't. 10W-30 is the same, whether it's dino, semi, or full synthetic.
The leaking seals used to be a problem because the dino oils caused an exceesive amount of gasket swelling. That's no longer the case, and hasn't been for some years now. I've switched older vehicles over without any problems at 60K-70K miles
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AmsoilSponsor
DakotaEnthusiast
 
7/24/2004
14:20:52
|  American Synthetic Oil = Amsoil Ams Oil Amzoil
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99bludak,
You may hear older relatives, friends, or associates tell you of this problem, and it did exist in the very early days right after synthetic oils were introduced.
#1) Seals manufactured and used in the 1970's were not of the same quality as the seals used today (as with most everything else automotive).
#2) Some early year, (as in the mid-70's) ... less than perfect or honest ... synthetic mixers and distributors tried to "jump on the synthetic bandwagon" without understanding the chemistry or having their own laboratories. These oils were not mixed properly and had too many detergents and not enough seal swell additives (which all oils contain) thereby having the double negative effect of (1) too aggressive cleaning of (2) low quality seals.
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If your engine has been well maintained you can switch your 1999 Dakota with 57k miles to synthetic.
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You can Request a FREE AMSOIL CATALOG by clicking below.
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
7/24/2004
14:28:36
| American Synthetic Oil = Amsoil Ams Oil Amzoil
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While on the topic, let's put to bed some of the objections you will hear concerning the use of synthetic engine lubricants (some are old debates ... some are new):
Myth #1: Synthetic motor oils damage seals
Untrue. It would be foolhardy for lubricant manufacturers to build a product that is incompatible with seals. The composition of seals presents problems that both petroleum oils and synthetics must overcome. Made from elastomers, seals are inherently difficult to standardize. Ultimately it is the additive mix in the oil that counts. Additives to control seal swell, shrinkage and hardening are required, whether it be a synthetic or petroleum product that is being produced.
Myth #2: Synthetics are too thin to stay in the engine
Untrue. In order for a lubricant to be classified in any SAE grade (10W-30, 10W-40, etc) it has to meet certain guidelines with regard to viscosity ("thickness"). For example, it makes no difference whether it is 10W-40 petroleum or 10W-40 synthetic, at -25 degrees centigrade (-13F) and 100 degrees centigrade (212 degrees F) that oil has to maintain a standardized viscosity or it can't be rated a 10W-40.
Myth #3: Synthetics cause cars to use more oil
Untrue. Synthetic motor oils are intended to use in mechanically sound engines, that is, engines that don't leak. In such engines oil consumption will actually be reduced. First, because of the lower volatility of synlubes. Second, because of the better sealing characteristics between piston rings and cylinder walls. And finally, because of the superior oxidation stability (i.e. resistance of synthetics against reacting with oxygen at high temperatures.)
Myth #4: Synthetic lubricants are not compatible with petroleum
Untrue. The synthesized hydrocarbons, polyalphaolefins, diesters and other materials that form the base stocks of high quality name brand synthetics are fully compatible with petroleum oils. In the old days, some companies used untested ingredients that were not compatible, causing quality synthetic lubricants to suffer a bad reputation. Fortunately, those days are long gone. Compatibility is something to keep in mind, however, whether using petroleum oils or synthetics. It is usually best to use the same oil for topping off that you have been running in the engine. That is, it is preferable to not mix your oils, even if it is Valvoline or Quaker State you are using. The reason is this: the functions of additives blended for specific characteristics can be offset when oils with different additive packages are put together. For optimal performance, it is better to use the same oil throughout.
Myth #5: Synthetic lubricants produce sludge
Untrue. In point of fact, synthetic motor oils are more sludge resistant than their petroleum counterparts, resisting the effects of high temperatures and oxidation. In the presence of high temperatures, two things happen. First, an oil's lighter ingredients boil off, making the oil thicker. Second, many of the complex chemicals found naturally in petroleum base stocks begin to react with each other, forming sludge, gums and varnishes. One result is a loss of fluidity at low temperatures, slowing the timely flow of oil to the engine for vital engine protection. Further negative effects of thickened oil include the restriction of oil flow to critical areas, greater wear and loss of fuel economy. Because of their higher flash points, and their ability to withstand evaporation loss and oxidation, synthetics are much more resistant to sludge development.
Myth #6: Synthetics can't be used with catalytic converters or oxygen sensors
Untrue. In fact the very low ash content of synthetics will extend the life of every exhaust system component.
Myth #7: Synthetics void warranties
Untrue. No major manufacturer of automobiles specifically bans the use of synthetic lubricants. In point of fact, increasing numbers of high performance cars are arriving on the showroom floors with synthetic motor oils as factory fill. Which may not make the dealers too happy since oil changes usually lead to other service work.
Myth #8: Synthetics last forever
Untrue. Although some experts feel that synthetic base stocks themselves can be used forever, it is well known that eventually the additives will falter and cause the oil to require changing. However, by "topping off", additives can be replenished. Through good filtration and periodic oil analysis, synthetic motor oils protect an engine for lengths of time far beyond the capability of non synthetics. Amsoil's unique additives packages allow for extended drain intervals.
Myth #9: Synthetics are too expensive
Untrue. Tests and experience have proven that synthetics can greatly extend drain intervals, provide better fuel economy, reduce engine wear and enable vehicles to operate with greater reliability. All these elements combine to make synthetic engine lubricants more economical than conventional non synthetics. In Europe, synthetics have enjoyed increasing acceptance as car buyers look first to performance and long term value rather than initial price. As more sophisticated technology places greater demands on today's motor oils, we will no doubt see an increasing re-evaluation of oil buying habits in this country as well.
Myth #10: Synthetic oils contain detergents that can make the oil seals leak in older cars
Synthetic lubricants do have an inherent detergency that cleans and removes conventional motor oil deposits left over in an engine. However, ALL motor oils are designed to help swell seals slightly to prevent leakage.
The only time you would observe seal leakage is if the seals are already damaged or showing signs of leakage around them. As long as the vehicle has been well maintained, and in good mechanical condition, it can be switched to a synthetic lubricant at any mileage.
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There are other MYTHS and non-truths circulating the forums, garages, and race tracks. The ten listed aboveare just a few that I wanted to address.
Conclusions
Since their inception, manufacturers of synthetic motor oils have sought to educate the public about the facts regarding synthetics, and the need for consumers to make their lubrication purchasing decisions based on quality rather than price. As was the case with microwave ovens or electric lights, a highly technological improvement must often overcome a fair amount of public skepticism and consumer inertia before it is embraced by the general population. But the word has been getting out as a growing number of motorists worldwide experience the benefits of synthetic lubrication. The wave of the future, in automobile lubrication, is here, and Amsoil has lead the march, recently celebrating their 30th year in business. For the environmental enthusiasts, the use of synthetics could reduce waste oil disposal by 80%, so if environment is your thing, then synthetic lubricants should be your choice.
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Request a FREE Amsoil Catalog by clicking 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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AmsoilSponsor
DakotaEnthusiast
7/24/2004
14:30:10
| American Synthetic Oil = Amsoil Ams Oil Amzoil
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Additional Information -- Seal Compatibility
AMSOIL lubricants are all tested for seal compatibility with all the seal materials in use with industry accepted testing methods. AMSOIL Products will not damage seals or be more prone to leaking than petroleum products when used in vehicles with undamaged seals. Unfortunately, high mileage vehicles and equipment that have been using petroleum lubricants for long periods of time face the risk that sludge and deposits have built up in the engine and created a false seal, and the seal itself has dried out and cracked or shrunk. Lubricants help condition seals, keeping them supple and slightly swelled to insure a proper seal with no leaks. When covered with sludge or deposits, the seal will deteriorate. Now you start using AMSOIL motor oil with it’s high quality additive package and natural detergency, and you start to clean up the engine. The false seal is cleaned away, and if the seal itself has become cracked or damaged, a leak will develop. The same thing occurs in transmissions and differentials. Because of this, many people think that synthetic oil is more prone to leaking, when all it really is doing is revealing the problem that petroleum oil deposits had created and kept hidden. Once the damaged seals are properly replaced, keep using the synthetic oil and they won’t leak again.
__________________________________________________
Request a FREE Amsoil Catalog by clicking 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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