The last thread I just posted should have stated 15-50 not 20-50 mobil 1. Sorry about that.

-Gary Burnette-

Speaking of Alaska, and Canada too I guess, the 1950's & 60's DEW Line (Distant Early Warning) defense radar operators had trouble starting vehicles in the cold climate.  They always had to use heaters.  I heard that a switch to synthetic lubricants eliminated the need for the heaters.  The first synthetic I heard of was Anderol, I think Tom Ivo ran it in his Buick powered dragsters in the 60's.  What I wonder about these days, is the amount of synthetic in the blended lubricants...I guess that should be a new thread. 

Paul J. - '57 E Code

Looking at the mobil 1 site it shows 20-50 pouring at 40 below sorta like the words outta the song springtime in Alaska sung by one of my favorite singers Johnny Horton.

-Gary Burnette-

Rob/ Canadian Hot Rodder: Since you are using 20-50 oil, can we assume that your not starting & driving your car during the worst of Ontario winters? Or that you are using a block heater or heat source of some sort? I would be reluctant to cold start your car during deep freeze ups with that oil...

Paul

This is an old topic, but I’ll reitterate some of the points that have been expounded on in the past.

STP gets a lot of credit for having the necessary zinc compounds or zddp to deter cam and lifter wear on flat tappet camshafts but upon examining the MSDS for the product, you’ll find that these compounds are minimal and will not boost Zinc Dialkyl Dithio Phosphate (zinc for short) levels in API SL or API SM oils to the API SJ and earlier levels. In fact, it barely supplements the amounts present in the earlier API SJ and earlier oils. But in STP’s defense, it was not originally formulated to provide these additional wear additives and the formulation has not been adjusted (based on the latest MSDS) to supplement the Zinc wear compounds that have been removed from the API SL and API SM oils. But there are a multitude of oil additives on the market now that will provide the required additional amounts of zinc (Zinc Dialkyl Dithio Phosphate) wear compounds to the API SM oils that are 30W and less. If the oil viscosity is over 30W, then the required amounts are still there at the earlier levels and were never removed. Some of this info was mentioned almost a year ago on page one of this particular thread.

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STP MSDS Link

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What must be remembered is that the mandate for zddp reduction was not to reduce the zinc but to reduce the phosphate compounds that are present in the oil. It’s the phosphate that is a perceived problem for the catalytic converters and it is the phosphate that was mandated to be reduced. The phosphate is the component which is attracted to the heat from a metal to metal contact and the zinc simply follows the phosphate around and attaches itself as an anti-wear agent to wherever the heat is being generated as a result of the any friction being generated. With the mandate to reduce the phosphate, the zinc amount itself had to be reduced as the two are partners or symbiotic in their relationship. This is the simple explanation.

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For those who are unfamiliar with doing a search on the site, here are links to past threads in which to bring newbies up to speed. But by all means do a seach for zinc or zddp to bring up even more on the subject as it’s been covered extensively over the last couple of years on this site and others and much longer than that if you include the old YBF site.

http://forums.y-blocksforever.com/Topic8508-3.aspx

http://forums.y-blocksforever.com/Topic1528-3.aspx

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The search function is found at the top and upper right of each page. Give it a whirl.

Lorena, Texas (South of Waco)

   Maybe this is old news but , I actually never heard of "Molly Slip "   ... Stp Oil treatment is still on any Part's stores display !!  I farmed for 20 years and never had a major breakdown , useing DELO #40 (Standard Oil) in everything , Cars trucks and Caterpillars !!!  The very high detergancy is simply to keep a clean engine and the oil turning dark soon after a change is a result of that ... Many truckers use a gallon of STP @ every oil change !!!   ALAN B .

Hi I went to the Adirondacks Nationals at Lake George New York. I  saw some guys selling a product called Cam Shield oil treatment with premium ZDDP. you add it to your regular motor oil. One 8 ounce bottle treats 16 to 32 quarts of oil 4ounce 8 to 16 quarts. I don't recall the price. You can check it out on line at www.cam-shield.com  I hope this info will be helpful to all of us Y-Block people. John

My understanding is that it's not the zinc that lubricates the cam, it's the Dialkyl DithioPhosphate that lubricates the cam. The Zinc is just the best way to get the rest of the molecule to the cam. When the molecule gets to the cam it attaches to the Iron Oxide and the Zinc goes into the bottom of the pan as sludge.

There was some research done by a tribologist at a Texas University. He had examined ZDDP using an electron microscope and found that it formed a fish scale like coating on the iron oxide surfaces of engine parts. As I recall, up to that point they did not know why ZDDP was a good anti-scuff agent.

Wow, searching for the online research finds some interesting stuff, including a possible explanation about why there is a break-in procedure for cams; the build-up of DDP on iron is an observable sequence.

Sciencedirect.com

Best regards,



Paul Menten

Meridian, Idaho

Actually, that is what I've been using for 3 or 4 years now.


Lawrenceville, GA

Spotted this at our local Kragen auto supply I found something never noted before. Valvoline racing  "VR1" has a little tag on the bottle HIGH ZINK for flat tappet engines. got a link that I don't understand all the terms but here it is, sounds like what we need for Y blocks

http://www.valvoline.com/downloads/2008-003a.pdf

If this has been discussed and decided on sorry...

Gerry

Lake Forest California  5th inf 77 Armor Div. VN 68/69

If you put your town and state in your signature

help might be closer than you think.