Don’t recall the ‘energy conserving’ rule off hand without looking it up.  But oil with API classification of SJ would still be the higher phosphorus/zinc content of ~1300 ppm regardless of the other labeling.  When the classification changed to SL, the amount reduced to a max of 1000 ppm.  And with the change to SM, a further reduction to a maximum of 800 ppm for just those oils rated at 30W or less.  Just remember the viscosity and labeling nuances stated earlier and you can still get oil with the higher zinc content even though it’s classified as SM.

Lorena, Texas (South of Waco)

hey guys. checkthis out. this article bounces arounda bit and is a lil contradictory to what i have read but check it out anyways. here's the link:  http://www.fmrcoa.org/newsletter/2006/Sept%2007%20Newsletter_Screen.pdf

Ted & '64 Ford: Ted, this subject has been all over the map in recent months, but your explanation of the ratings & anti scuff material content is probably the best I've read. Thanks!.. And 64 Ford brings up a good point on the energy saving rated oils, the ones with the "starburst" on the label. In an article in YBM a year or so ago, John Mummert recommends "not" using those oils in solid lifter/ flat tappet engines, as they are intended for late model engines & are low in anti scuff content..

Paul

Hi with all the hype about the zinc taken out of the motor oil seems to have us a wondering what to put in our y-blocks . I was reading an ad in Street Rodder for Amsoil synthetics.         To find out about Amsoil call 1-800-777-8491 or go to www.amsoil.com

I know your pain on the broken clip. I had 1 break and the parts passed thru the pin so not only was 1 side of the bore damaged, they both were.

When I first pulled the head I could not figgure out what would score both sides of the bore. I now have a cylinder with a sleve in it. Has run the last 10,000 miles with no problems.

As for oil, I have been using Valvoline 10-40 and GM EOS that I had stockpiled before it was discontinued. I was told it was back on the market but it is not the same product anymore.

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.

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


Lawrenceville, GA

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

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

   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 .