The highest ZDDP Synthetic I can find
 

M-1 20W-50 V-twin

ZN 1450

Phos 1600

I am running Valvoline racing 20-50, how does this compare to the M-1 20w-50 V-twin? here is a link to jegs where I order it from http://www.jegs.com/i/Valvoline%20Ra...VV855/10002/-1

Weak!! I was in awe of the low levels of ZDDP. Not good for a flat-tappet engine.

Switch to Shell Rotella T if you prefer conventional oil or Mercury 25w-40.

..one race and out..tons of calcuim for detergency.

Hydro....any information on how the Amsoil 20-50 motorcycle oil compares with the Mobil V Twin? as far as ZDDP

Repeat of 20W-50 VRI

This is the non street legal full synthetic version

Here are the virgin sample results for this oil from Blackstone Labs.

Low ZDDP:(

Aluminum 0
Chromium 0
Iron 1
Copper 0
Lead 0
Tin 0
Moly 0
Nickel 0
Manganese 0
Silver 0
Titanium 0
Potassium 0
Boron 0
Silicon 5
Sodium 2
Calcium 3852
Magnesium 9
Phosphorus 946
Zinc 1031
Barium 0

TBN 17
Flashpoint F430
Fuel 0
Water 0
Antifreeze 0
SUS Visc @ 210F 92.7

It's VR-1 Racing I believe.


http://www.valvoline.com/pages/produ...asp?product=50

Unfortunately I do not have a test for that product.