Blending Dino and Synthetic

[DocB]

Anybody see or know of a problem blending (mixing) Dino Group II base oil and
"synthetic" Group III ?
For example: Rotella T 15W-40 and Rotella T Synthetic 5W-40.
I have been using and have alot of Rotella T but would like to take advantage
of the synthetics 5W winter properties, especially at start up.
After I started thinking about it, sounds like the higher V.I. (Viscosity Index)
and TBN of the synthetic might be good all year round.
Could just switch over to 5W-40, but wanted to use up my stock of
regular T.
Thinking about a 50/50 mix at next oil change.
Anybody ever done this?
Should I start slow, like 25/75 first to clean out engine?
What do ya think?

[Clay Henry]

bad, bad, bad idea I think....

[DocB]

Why ? Why ?

[00Stroke7.3]

IF you look on the SHELL oil site ROTELLA NEWS: Will I Harm My Engine By Mixing Synthetic Oil and Mineral Oil?

It says it's A OKAY!

[DocB]

Thanks. I checked out the Shell site in the mean time.(oil headache now).
(I know, LOOK before you ask!)
It's mincing/splitting words, but check this out (same guy?)

- Browse ROTELLA FAQ by Topic or Key Word
Under "lubrication technical questions".
Let me know what you think.

[DocB]

Their blended commercially available oil has very little "$ynthetic" in it.
?Maybe the just don't want us to make an INEXPENSIVE oil with
excellent properties? Just a thought.

[DocB]

Think I'll call Shell tomorrow and find out why not!
Probably tell me additive packages don't jive.

[stump0331]

dang docb ya talkin to yurself?

[DocB]

Ya, I guess.
At least I know SOMEBODYS listening!