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Dodge Diesel - Diesel Truck Resource Forums (https://www.dieseltruckresource.com/forums/)
-   3rd Gen Engine and Drivetrain -> 2003-2007 (https://www.dieseltruckresource.com/forums/3rd-gen-engine-drivetrain-2003-2007-102/)
-   -   What miles did you change Dino to synthetic oil and did your engine start leaking? (https://www.dieseltruckresource.com/forums/3rd-gen-engine-drivetrain-2003-2007-102/what-miles-did-you-change-dino-synthetic-oil-did-your-engine-start-leaking-173792/)

dart4forte 10-18-2007 05:34 PM
Oil
 
Changed at 3K, no problem other than black oil

HOHN 10-18-2007 07:59 PM
Originally Posted by RHC (Post 1743424)
What miles did you change from Dino engine oil to Synthetic oil? Did changing to synthetic oil start your engine to leak oil any at all?

I am using shell rotella, thinking about going to Valvoline Premium Blue Synthetic. Got about 52,000 miles on the truck.

Thanks

I switched mine at 12K.

No negative issues at all-- no oil consumption problems, no low MPG or anything.

I've also switched back to dino, and back again to syn. NO problems.

I've mixed syn and dino. I've mixed 15W-40 and 10W-30. NO problems. Consumption remains normal-- which is to say that it doesn't seem to burn a drop between changes.


Cummins says 20K and there's nothing wrong with that, but I think it's a little cautious. Engine break-in is a logarithmic function, and 20K isn't much different than 10K.

TurboTed 10-18-2007 09:33 PM
Originally Posted by D-Roc (Post 1746467)
So, it is highly possible that your 0W40 say, at 80 degrees f may actually be thicker than a 15W at the same temp- all depends on the brand and the viscosity at a certain temp.
I think we're on the same track. Let's say the oil is made by the same company. 0W40, 5W40, 10W40, and 15W40 should all be the same viscosity at 100 degrees Celsius. Obviously the 0W40 will be less viscous at say -30 Celsius. I am not sure whether it will be less viscous than the others when you start up at +20 celsius in the summer. However, you can use synthetics such as Esso 0W40, or Dello 5W40 for easier starts in the colder months. So- what's important I guess, is that all the oils with a 40 weight will only thin out a certain amount at a really hot (say 100 Celsius) temperature. I suppose there are other 30 weight oils made by another manufacturer that will stay as viscous at those temps.??[coffee]

preloader 10-22-2007 05:31 PM
Changed to Amsoil 15-w40HD at 20k, now running a less expensive syn., Rottela-T 5w-40. No problems

Hounddog 10-22-2007 05:41 PM
Differance in price is also the differance between a Group 4 full synthetic and a Group Three dino oil thats caled synthetic and just been cooked a lttle better and longer then standered oil.You get what you pay for.

DieselBD 10-22-2007 05:46 PM
Originally Posted by RHC (Post 1745229)
Thanks for the replys. Thinking about going to Valvoline Premium Blue Synthetic 5w-40, but i can't find it. One place , car quest can order it.
I saw it at Autozone.

I just changed my oil to Rotella synthetic, 40k miles, no leaks,


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