Dont wish to start a war but in my experience, synthetics like Delvac-1 offers the best protection along with synthetics from other players like Amsoil and Chevron but if money is a consideration, you cant beat the value of Delvac Super/MX and Delo 400.

Well, it's better than the endless poitical debates over at the open discussion forum :D

It was three years ago when I last checked, but CH-4 was not on the Mobil 1 bottle, and not claimed on their web site tech specs. They have pages that go pretty deep into tech specs.

Perhaps the popularity of pickup diesel engines drove them to reformulate Mobil 1.

CH4 has been on Delvac 1 since it's introduction and same with Mobil 1 Truck & SUV oil. I just looked at Mobil1 15w-50 oil it's CH4. However the 5w, 10w Mobil 1 do not carry that rating, and I've never looked at the 0w oil. :D

Hey i don't want trow any oil into the fire but i found this web page

http://www.synlube.com/synthetic.htm

the information seems okay but then when you have look at their products "oil for life" (and that's not cheap oil 32$/L for engine oil..)

synlube synlube synlube
 

Hellavu web page. Written by someone with a lot of time to research things, then place the info in the right order and wrap it together with psychological bent towards selling product!
My vote that link is the best reason for a dedicated OIL THREAD subject button.
I say take all the oil stuff to a separate forum:)
DDH

Mobil Delvac Super/MX is now rated CI-4 for anyone interested.

Oldnavy, I think you are mistaken. I just looked up the PDS and it is rated CF which is an old off road diesel spec. Whatever that means. Anyway, this oil is the elixir for the turbocharged road racers. It's not really designed for a diesel. Don't get me wrong it does very well in our MB's but it's not nearly as good as CI-4.

Wait, wait, wait! Can I be irritated? Its another danged oil thread! Let me tell you about the engine compartment elves.... RT

I'll call your Mobil 1 and raise you three quarts of Dello 400..........

William Rogers......

Has anybody ever used ANY oil in their car/truck that did not perform its expected function perfectly?

I don't want to whine but these oil threads leave me totally baffled - if you use a quality oil recommended by the engine manfacturer and change it according to the requirements in the owners manual your car run for decades without any need internal engine work. Unless you live in the southwest or California the body will literally fall apart before you have any internal engine issues.

This will be true if you use $5 dollar/quart diesel rated synthetic or .99 quart no-name generic oil, as long as the oil contains the required ratings it will work fine.

Can anybody explain to me why hardly 2 minutes goes by without a "new" oil thread discussion about a topic that has a clear, well proven and seemingly straightforward answer?

Please do! :D

You jest, but such things do exist. I ordered a pamphlet from some animal group last summer to help me drive weasels out of my attic. It quoted newspaper articles about weasels attacking cars (wires, hoses) in some Swiss village. Nobody knows why they suddenly started chewing, or why they stopped ... :p

Yes. I first used dino oil my my 300TD, because I change it so often that synth gets expensive. But then a lifter started clacking. After I changed to Mobil semi-synth, the clacking went away, except for a few minutes after startup.

Darn you went and looked...jeash!!! :rolleyes:

Mobil has never had the oil CH-4 certified, but under oil analysisn it almost identical to D1. The main difference in lay terms is it is not quite as good handling soot, but film strength is better then D1.

Amsoil has oil that is probably as good as Mobil, but in the past they have not had the testing done to get certified. Probably didn't want to spend the hundred's of thousands of dollars to have it certified.

There could be only two valid options:

A-They are part of the some secret/evil swiss army experiments

B-They are trying to take over the world
Soon in a theater near you
"Planet of the weasels"
Bush will play himself, the presidents of the weasels ;)