Hi Guys. What is everyone using for oil. I've been using Shell Rotella 15-40. Getting tough to get now. Coming thru w/synthetic blend. Is this OK. Are there any other brands you guys use. Thank you.

Check this out     https://540ratblog.wordpress.com/

In addition to the link that Cliff provided, here are just a few of the links to threads available on this site regarding oil for the Ford Y.

Break in oil
General discussion 1
General discussion 2
General discussion 3
Gil Baumgartner oil study
Multi-viscosity oil clarification
Why to not use diesel oil in a gasoline engine
ZDDP

Lorena, Texas (South of Waco)

Wow...that 540ratblog is a veritable rabbit hole.  Helped me change my mind about the gear oil I planned on running, though.  

Lucas 10-30 Hot Rod oil. Stays close to the 20-20w Henry recommended on the glove box sticker. Nice flow from the rocker arm shafts when warm. 

56 Vic, B'Ville 200 MPH Club Member, So Cal.

Valvoline VR-1 10W-30.  No additives needed.

Here’s what I use, It’s a high zinc formula for flat tappet engines.
Valvoline 20W-50 VR1 Racing Oil part #vv211 or NAPA VAL822347

It comes in a six pack.

1955 312 T-Bird Warwick, NY

Ted has always said diesel oil is not the best for a gas (especially a Y) engine.  I go with what he uses - Valvoline conventional 10-40. 

As stated in the article,  ZDDP is not the best measure of a good oil.  And to much can cause increased wear


54 Victoria 312;  48 Ford Conv 302, 56 Bird 312
Forever Ford
Midland Park, NJ