Oil for flat tappet engines

[Uncle Buck]

I've recently learned that most motor oils today have modified their formulas to be friendly to catalytic converters but not so friendly to flat tappet engines.

I know there are additives and have also read that certain diesel engine oils are Ok.

Any suggestions for readily available options?

[ZR]

Several "Hot Rod" oils out there with the correct amount of Zinc / zinc substitute to keep your flat tappet cam alive n well.
Rotella 15w40 (non syn) Diesel is another good option.
You could also contact Ryan (Mr Amsoil) to see what they have to offer.

[Uncle Buck]

I saw Valvoline has a racing oil called VR1. It'll make my car faster :) but not convenient to get.

Why change from 10w30 to 15w40 if using Rotella?

[ZR]

It's our go to oil for all things push Rod Ford.

[Uncle Buck]

Good enough for me. As always, thanks for the good advice!

[ZR]

Your very welcome.