Re: NO ZINK IN THE MOBILE 1 OIL ANYMORE
 

I thought I'd go straight to source so to speak and contacted the Mobil support people, here's their response in full.

"Thank you for your inquiry,

The new ILSAC GF-4 motor oils (10W30 and lower viscosities) do have reduced (0.08%) ZDDP in the formulation for longer longevity of the catalyst converter and system. This is not a problem on newer vehicle designs that utilize the roller cam, valve train technology however, if you have flat tappet cam, valve train technology you generally want higher ZDDP levels. Mobil1 15W50's, Mobil1 diesel motor oils, Mobil1 motorcycle motor oils and Mobil1 High Mileage 10W30 and 10W40 have high ZDDP levels and would be the best choices for these engines."

Hope that helps.

Re: NO ZINK IN THE MOBILE 1 OIL ANYMORE
 

So now the big ? still is are we roller or are we flat---hmmm- the puck looks pretty flat to me IMO. What do the rest of you think??? Until is was pointed out to me as of recent I did not know that we actually have "hydraullic action" and the PUCK is a lifter of sorts!!!

Re: NO ZINK IN THE MOBILE 1 OIL ANYMORE
 

Perhaps it doesn't matter too much - using the Mobil1 10w30 High mileage then you'd get the zinc anyway?

Re: NO ZINK IN THE MOBILE 1 OIL ANYMORE
 

good point Dave perhaps you cannot have too much zink---well in your lt-5 engine anyway!!!

Re: NO ZINK IN THE MOBILE 1 OIL ANYMORE
 

Interesting article :

http://www.svmgcc.org/tech_tips/oil_is_killing.htm

Re: NO ZINK IN THE MOBILE 1 OIL ANYMORE
 

YES VERY GOOD FU2 BUT STILL WAITING FOR THE OPINION ON IF OUR PUCK IS FLAT AND A CONCERN---SEEMS FROM THE ARTICLE THAT THE ZINK IS A NICE ADDITIVE FOR ANY COMPLEX ENGINE WITH LOTS OF HIGH PSI WEAR POINTS---GEE DOES A 7,200 RPM LT-5 QUALIFY----HMMMM

Re: NO ZINK IN THE MOBILE 1 OIL ANYMORE
 

Looks pretty flat to me. the picture is top and bottom views top mates with the valve the bottom to the cam. No rollers here.
http://home.comcast.net/~bsoomann/folower.jpg

Re: NO ZINK IN THE MOBILE 1 OIL ANYMORE
 

Well that is what I figured all along Bill after all taht pic was made for me since I did not know that we even had any hydraullic lifter---I though it was all solid---anyway soundz like high zinc is good for the engine and bad for the cats---hey though plugged cats is no biggie to fix vs a worn out engine---so do we all think it is best to use the additive by gm for break in all the time now when ever we change the mobile 1 synth oil??? an extra 12 bucks is not a big deal when the oil change is high $$$ to begin with--- would be nice to have the tuners chime in with their two cents worth!!!

Re: NO ZINK IN THE MOBILE 1 OIL ANYMORE
 

Thats where I am Brian. Hoping some one would pop in with a recommendation based on this information. What I have seen so far has me leaning toward "red line". Still putting my engine back together so not ready for oil yet, but soon.

Re: NO ZINK IN THE MOBILE 1 OIL ANYMORE
 

I use a quart or two of 15-50 Racing oil (Torco etc) in with my Mobil one oil changes. Been doin this for years in leu of the diminishing zinc. Is it overkill or necessary ? I do not know. It sure isn't hurting.
Just switching over to Red Line Racing oil might just be another way :thumbsup: