I'll preface this by saying I WAS an amsoil dealer until July.

I'm currently on my final fill of Amsoil series 2000 0W30. Once I'm done with this round of oil, I'll be going back to Mobil1. Why? Because it is cost effective and conveniant to buy locally.

Nothing wrong with any of the products that meet the spec listed above, and I'm with Rockin'Silver 02... You make a claim, you might want to show facts...

Look guys, this discusssion gets old and comes around about every 6months. A good quality synthetic oil from the majorety of manufacturers out there is gonna be fine in most of your cars. Is brand X better than brand Y? Maybe in that specific vehicle's case, but not necessarily in "ALL" cases... Go over to www.bobistheoilguy.com and get an education on oils and lubricants. I've got a number of tests from Amsoils independant lab for testing, and we beat the snot out of both amsoiil and Mobil1 in my truck (towing scenarios) and my vette, which was used during track days, and with various synthetics, we were getting a LOT of mileage out of both. Like 12K miles out of the chevy Silverado with more life left in the oil at the change interval...Saw that on BOTH amsoil and Mobil1 and I bet I'd have seen it on Syntech as well...

Just use good synthetic oil that meets the required spec, per vehicle manufacture recommendation.

It's oil, not the cure for cancer...

Mike

 

 

Castrol Syntec 5W40 European formula here-I find the 30W breaks down too fast, evidence is the catch can.

 

Just because they make a claim on their bottle does not make it true
Read GM's own bulletins it was stated again last march in GM's Techlink and also in reference guide via SI that the policy was changed to do away with oil makers making the claim when GM never approved them so the oil must also be registered by GM

 

WTF!

 

I love it when people come up with "show the facts" same goes for oil makers or people just saying "use this brand" when its the car owner who takes it in the shorts when GM finds a reason to void the warranty because the engine is using non approved oil that the car owner used because it was lead to believe that if the bottle says its meets a spec yet they really do not know the spec being they were never tested or approved by GM saying they met those required specs.



Fact is GM has released multi times about oils must now be registered to rid the whole marketing claim of oil makers saying they meet GM specs when GM never approved and registered them as doing so.

People will use whatever the oil they want but they also should know what new rules GM has put on the oils we use

 

Good God people. I see a post on what the best oil is about once a month. It turns in to be an arguement over which is best. We need to ask ourselves and others the question. Have there been any oil related engine failures in recent years through the manufactures quality of synthetic oil? I don't think so. Any law suits against any of these companies? Nope. Do Neglect and abuse, not changing oil at regular intervals make any one brand better than the other. Nope. Jeez, we are talking about full Synthetic oil here. Some times I think we go way overboard on this subject. just like the Car waxes.. Which is best? Lets not get started on that one. Next subject... Which bottled water is healthiest for your body???... Dasani has more of a crisp flavor and added minerals than Deja Blue...

 

That's what I've been using. Changed from Mobile 1, because I've been a Castrol Syntec user, 10W30 in the summer months and 3W30 in winter for years. Yes I believe in the claim to "meet GM Standard 4718M" A reptable company would not just print this on their lable, at lease I and many more hope not. My $.02
Rsty

 

How has GM issued these "new" rules? I own a 2002 Z06 and they haven't told me. My owner's manual states to use an oil "meeting GM Standard 4718M." It is not a secret what this standard is and I would be highly surprised to find that any of the major oil companies were labeling their synthetic oils to meet this standard if they did not. That would subject them to warranty claims from GM and the owners. All your list above shows is who has registered their oil with GM, which in my opinion is probably another money making scheme for the General...

 

No you do not know exactly what GM's standard is, they own it its their internal specs used to do inhouse testing to determine if a vendor will be a tier 2 supplier or be approved as meeting their specs, not your's or even API.
Yes GM states oil must meet 4718M, it also says the oil must have been tested and have the starburst label and GM can anytime change their own standard which since last year changed to include the vendor must be registered which means it complies with GM and API requirements and means it has to pass their tests and not some vendor simply claiming to meet GM standards when in fact GM never tested them.

I always have wondered why these non GM approved oil makers never spend some of their profits for API certified or GM tests and get it over rather then making a claim about exceeding GM standards well now they have to prove they are GM approved.

If all it took was to register with GM there would be many more then just 3 vendors approved for synthetic grades would'nt there being this change to 4718M happened last year and if we like it or not that is what GM has changed to clear up who really meets the standards GM tests to.
Why should some oil makers spend the time and money to have their products GM approved while other makers do nothing yet simply claim they meet or exceed a GM standard they never allowed GM to test so being we could use **** instead of oil if changing often enough but my point is when someone asks if they should change brands GM requires they should know what vendors in fact comply with their GM warranty.

 

Iv'e Used Castrol Syntec Ever Since Consumer Reports Rated It 5 Times Better Than Anthing Else On The Market. And That Was 10 Years Ago.

 

Wow, look at Castrol synthetic as well as other synthetics in the non synthetic group. Whats up? Gm can't even distinguish non synthetic from ordinary oil. Read it. What a joke. Castrol Syntec is non synthetic??? Good God. BS all the way. Typical big business politics all the way. " Pay us off and we will endorse your product". What a joke. I guess Royal Purple is a non GM brand too. As well as Red Line. Its amazing what people will believe. Un-freaking believable. Its human nature. Sad but true. How much money do you think the 3 endorsed companies are paying GM?? WAKE UP!!!!!! HELLO IS THERE ANYONE OUT THERE??????? KOOKOO KOOKOO KOOKOO. The world is flat and I have snake oil that cures it all. Serious stuff that most believed years ago.. We laugh at it now ,just as our grandchildren will laugh at this thread...

 

GM never approved them so the oil must also be registered by GM[/QUOTE]

That is nonsense, just another way for GM to make a buck. Castol Syntec is just as good as Mobil 1 regardless if GM "approves" it or not. That's just a money thing, nothing to do with oil quality.

 

Amen Brother. Its all about making the extra dollar and trickery to the public... I'm sad that a lot of these members are brainwashed by what GM says. Our Government does the same thing and people confide in them... The same thing goes on in the pharmiceutical industry. It is sickening to say the least.

 

I've been using Syntec in all my vehicals.

 

Your list doesn't have Mr Goodwrench G.M's Own oil? Got to be bogus. I like Syntec But A lot of Good car owners. Might have great luck with others.

 

I used the highly regarded German made Castrol Syntech 0-30. Gives a little more oil pressure and the reports from people who have oil analysis done it is very good oil.

I also sold my vette a month ago so if anyone is looking to try this oil I have 13 quarts for sale.

You can do a Google search and find out a lot about it.

 

GM RECOMMENDS Mobil 1. Why fool with some inferior boutique oil?

 

Well, "inferior" would have to be supported by testing. As stated earlier by Mikelly earlier, check out bobistheoilguy.com and learn all you ever wanted to know. Used oil analysis is the only way to really know, but I'll repeat, any of the synthetics will do a great job. Personally, I've switched one vehicle of mine over to German Castrol (0w30) from the Mobil 1 and 'perceive' that the engine runs smoother, especially as it gets HOTTER!!! I like it, know it's doing no harm and will continue using it as long as I can find it. I plan on switching over the LS1 on the next oil change based on my experience. My point is that the individual should choose, if a high quality synthetic, and based on his preferences (oil analysis, price, availability, etc) select one and go with it. Only use Mobil 1? It's like saying that all Corvettes should be Red.....(which of course, we all know they should!!!)

 

I think you'll find that if you read your owner's manual that GM doesn't actually recommend Mobil 1. Mobil 1 is factory fill and they state that this oil meets all GM requirements. My owner's manual only recommends an oil meeting GM Standard 4718M.

One thing to keep in mind here is that not all synthetic oils are created equally. Most synthetics on the market (including Castrol Syntec) are a Group III synthetic, which uses a highly refined petroleum base stock. A group III synthetic is much less costly to manufacture than a Group IV or V synthetic. API has declined to define synthetic. Calling a group III oil "synthetic" was upheld in the courts (Mobil sued Castrol).

AMSOIL Series 2000 0w30, AMSOIL SAE Synthetic 5w30 and Mobil 1 are Group IV, PAO based, synthetics and both probably have a small amount of ester additives to the basestock along with other anti-wear and detergent additives. Redline is a Group V, ester based, synthetic.