My last oil change I switched to Rotella 5w-40 synthetic & almost immediately noticed a difference in the truck as well as a fowl oil odor for the first 300 miles... well i went back to wal-mart where I got it before and they have no more on the shelf, but they do have the mobil 5w-40 synthetic at 19.50 gallon and it says it meets all diesel certs for the cummins.

My question is would it be alright to switch to the mobil this time even though there would still be some rotella in the system... And if I go back to walmart again down the road and there out of that but have rotella would it hurt to go back to that?

Basically is it alright to switch oils?

 

i dont think that it would hurt to have a little bit of rotella left in it. Im running a fully synthethic rotella t in mine. anyways i wouldnt worry about it if it was my truck but dont do it jsut becasue i said something. but i try to stick with the same oil every time. And as for the foul odor i think that it might be a little bit of oil spilled on the exhaust manifold. Because after all the exhaust manifold is right under the filler cap.

 

What Shell says

Shell produced a limited quantity of ROTELLA T Synthetic, a heavy-duty motor oil, with an "off" odor. This product continues to meet all current performance specifications and our Health, Safety, and Environment Department has determined there are no health risks from exposure to this oil.

Shell has not recalled any batches of ROTELLA T Synthetic engine oil.


If you have containers of ROTELLA T Synthetic that have an unpleasant odor, and wish to replace it, Shell will reimburse you for the cost of the oil. The product should be disposed of as you would used oil, in compliance with proper disposal methods. If the off-odor product was installed in your engine, Shell will reimburse you for the direct cost of the oil and filter change.

Shell regrets any inconvenience this may have caused you. To receive a refund for product or payment for an oil change, please send the following to the address below:

1) The batch number printed on the bottom front or back of the container (starting with 3 letters).
2) A copy of your receipt for the oil purchase or oil change (if applicable).
3) Identification of the store where you made the purchase.
4) Your name, address, and telephone number.


Send to:

Shell Lubricants
Attn: Sally Clark - 29 Floor
P.O. Box 4427
Houston, TX 77210-4427

We appreciate your understanding in this matter and value your business greatly. If you have any other questions, contact us at 800-231-6950.

 

Which oil is a better oil... Rotella Syn or Mobil Syn? I've read that the mobile is not fully synthetic but meets qualifications for it...

 

engcogod,

Actually, you have it backwards. From what I understand, the mobil oil is a true synthetic, while the rotella is not. I am sure someone will chime in with the differences.

Waylan

 

i meant to say rotella....lol oops

 

MOBIL IS A TRUE SYNTHETIC NO DINO OIL HERE

 

My "camp" says to choose one oil and stick with it. The additive packages are designed to counteract the particular acids, etc. that are produced when running that oil. Changing brands can lead to not having the proper package for the residual conataminates in your motor.

Take it for what it's worth. The "theory" was taught to me by a guy that used t make NASCAR and hot boat motors for a living. That sid i use Delo 15-40 in every motor I own gas or diesel. If I lived where it gets cold in the winter I might change that.

 

if you are worried, short change it. I read on Mobil's site once that Mobil1 is compatable with other oils, but just run the first batch for 1000 miles and change it a second time and all the rottela will be diluted enough.

You should try to stick with one oil, but if you are switching over it is not an issue

Chris

 

What about soot control differences between the Rotella and Mobil 1 ? Rotella seems to tout that, while there is little mention of it from Mobil 1 ( at least on their 5 quart container ). Does Mobil 1 have similar / the same soot control properties ?

 

Are you looking at a container of Mobil 1 (gas engine oil) or Mobil Delvac 1/Mobil 1 Truck & SUV (repackaged Delvac 1 - diesel engine oil)? Does it have the API CI-4/CI-4+ donut? If it does, then it has the required detergency/dispersency for soot control.

Rusty

 

The Mobil 1 container for the Truck and SUV synthetic 5w-40 that they just came out with.

Its really repackaged Delvac ?

 

Yep, Delvac 1 in consumer (versus commercial) oriented packaging.

Rusty

 

Good to know, thanks brother.

 

How many miles you figure you need to have on your motor before you move to a synthetic??