Motor oil and Zinc....again

[Unreal]

I thought I posted this yesterday, but I went looking for any responses, and I can't find the question....I must be losing it!
I have searched hi and lo for Rotella T CI-4, with no success. I recently picked up some store brand 10W30 from Tractor Supply, that has the CI-4 rating. Would it have the same zinc as Rotella T CI-4?
Thanks,

[Keith Tedford]

The Rotella T that I just picked up has a designation of CI-4 Plus CI-4 SL. Meaning? http://www.yenko.net/ubbthreads/images/graemlins/confused.gif

[Unreal]

Bump

[retengw31]

I've been buying the Rotella T 15W40 CI-4 and CI-4 Plus from Tractor supply for my diesel P/U and my W31 and 442. I picked up some yesterday and when I got home, it says meets CJ-4 as well as CI-4 Plus. No other appearance change in the packaging.

I've heard that is the new low zinc stuff to stay away from in our old cars and trucks.

Now what?

[tirebird]

Here is an answer from a Mobil 1 tech to the same question I asked of the company about a year ago.

"Mobil1 MX4T 10W40 and Mobil1 V-TWIN 20W50 motorcycle motor oils, Mobil1

15W50 Extended performance and Mobil1 5W40 diesel motor oils contains
the higher levels of zinc and phosphorous for your cams. The new energy

conserving motor oils do have reduced levels of zinc/phos however, they

typically do not have any adverse effects on cams unless you are
running
higher valve spring pressures. I would suggest you stick with the
product listed above if you are concerned about the phos/zinc issues."

-Matt