540 rat has been staging a marathon discussion over on SpeedTalk..  He has been called out on his methodology and motives by a lot of guys who think his conclusions don't square with their beliefs.. I buy quite a bit of what he is saying. 540 rat has spent his own money testing many oils for their chemical analysis and posted results.. I actually sent him two local discount store oils that I use in my everyday stuff.. They fell mid pack on the psi test ahead of some of the big name stuff  At 2.50 qt I will keep using it  lol

He is very thorough in his testing methods.. Whether they are valid for a running engine is an open question.

RB

Made a call to Mobil 1 and found their high rated 0W40 with 127,221 psi has 1100 ppm in zinc. This was not stated in the article and really don't know how safe it would be in a yblock but had their highest rated psi of any oil.


-Gary Burnette-

[quote][b]DANIEL TINDER (9/28/2016)....I fail to see the relevance re: solid lifter/flat tappet cam lobes lubricated with crank spray? 
I was especially impressed by his attitude re: break-in oil for flat tappet engines....

Never mind. I just re-read Ted's post re: lifter rotation. Higher wear break-in oil (and the need for complicated break-in procedures to protect the cam) may be dictated by the Y-Block's unique tappet design. The modern pushrod performance engines the blogger refers to (that require no special break-in, and can utilize oil from the first start with the best wear #s) don't have that limitation.

6 VOLTS/POS. GRD. NW INDIANA

Interesting.  The article makes the argument that viscosity has no relation to 'wear protection capability', and the thickness of the oil film is irrelevant.  I assume ultra low viscosity might drain out of the bearing spaces faster than the pump could replace it, or viscosity that was too high might prevent large clearances from being quickly filled (?), but I fail to see the relevance re: solid lifter/flat tappet cam lobes lubricated with crank spray? 
I was especially impressed by his attitude re: break-in oil for flat tappet engines.  His point being that the tradition of rapid ring break-in has no real value, since it also means you risk wiping a cam lobe at the same time.  He claims the long, complicated break-in procedure we have been taught is unnecessary if you use the best wear-tested oil & prime just before start-up.

6 VOLTS/POS. GRD. NW INDIANA

Claims many credentials but unless I missed it there was no name attached. Not normal practice for anyone making a scientific claim.

I think all should keep in mind that anything posted on the internet is up for question.
I did read the post and it came across to me more like someone giving a high pressure sales pitch the way he constantly repeated how he was so wright and others were so wrong. Normally a true professional would state their argument and the facts to support it, not continually repeat over and over again how wonderful they are.
I don't know enough to say if he is wright or wrong, and I'm sure much of it is true. By the way it was written makes me question its validity. 

So the whole "must have zinc for vintage engines " is a load of bull? I have to confess I couldn't get through the article. It's much to wordy and lengthy to hold my attention. So based on what I understand any conventional oil with a rating of 40w is fine for our y blocks?

Durham Missouri

Most gasoline engines at this shop are broken in using conventional grade Valvoline oil.  The bearing clearances dictates the viscosity to use but most Y builds are built such that they are broken in with 10W-40 weight.  I will avoid oils that have less than 30W in their weight classification on those engines using a flat tappet camshaft.

Lorena, Texas (South of Waco)

regarding teds info re diesel engines,the big chang in there oils needs was due to supper low sulphur fuels legislated and emission changes which forced makers to resurculate exhaust to eliminate certain contaminates, while decreasing fuel consumption 16 to25%and as well increase repair costs substantial amounts. pickup engines are no different to other on highway diesel fueled non spark ignition  engines, with 2 exceptions,all made in north america pickups have no linners
                                                                                 and 50% have bin altered with computer alterations and over fueled  and meet no emission standards.especially in canada .diesel pickups that very seldom work are the most problems and will never pay back the extra cost of purchase as well as high service cost.the ones used as designed are great

look at5/30 quaker state ultimate durability api sn =95,920 psi zink877ppm phos921ppm molet=72ppm
or castrol gtx convention apisn=95,543psi zink tdb phos=tdb moley= tdb if you need more try rodger he has a big list.if you look at race oils not much better than the inexpensive stuff oil marketing is based on b/// sh'''' as much as facts