Which oil is better to use
 

WHAT IS THE OPINION OF MERCEDES DIESEL OWNERS ON WHICH OIL IS BETTER TO USE...... IS SYNTHETIC THE WAY TO GO?

WHICH IS BETTER ROYAL PURPLE SYNTHETIC OR AMSOIL 0IL?

U CAN EMAIL ME AT soto3368@yahoo.com regarding this post

Now, that's a thread starter...
 

I asked the same question awhile back, and I'll sum up the answers I got.
Two Schools of thought:

1. Use a good grade diesel oil, such as Rotella or Delvac.

2. Use a synthetic, ie Mobil's, etc.

Some think that because the synthetic has a lower level of zinc, it doesn't lubricate the top-end of older engines as well, since they were designed for newer, cleaner diesels. I don't know, as I'm not a chemist or engineer.

As an homage to Forcedinduction, to paraphrase, "Amsoil uses Mobil's synthetic oil as a base, and adds it own additive packages, so you might as well just use Mobil Synthetic." Hope I got that one right. Anyway, just use a good oil, and change it frequently - more frequently if it's not synthetic.

Oh,
 

And on a personal note, I use Rotella 15-14 right now, and probably will for the next couple oil changes, then will switch to synthetic.