VP C-10 for 4 stroke?

Sorry cannot help with any advice but just curious of the Octane ratings :-

TYPICAL VALUES
• Color: Clear
• Motor Octane 96
• Research Octane: 104
• R+M/2: 100

What does the Motor Octane =96 and Research Octane =104 refer to exactly?
Presume the R+M/2=100 is the Octane between the Motor and Research figure averaged out, equalling 100?

Sounds kind of interesting, would like to know more bout these ratings.

The most common type of octane rating worldwide is the Research Octane Number (RON). RON is determined by running the fuel in a test engine with a variable compression ratio under controlled conditions, and comparing the results with those for mixtures of iso-octane and n-heptane.
Another type of octane rating, called Motor Octane Number (MON), is determined at 900 rpm engine speed instead of the 600 rpm for RON.[1] MON testing uses a similar test engine to that used in RON testing, but with a preheated fuel mixture, higher engine speed, and variable ignition timing to further stress the fuel's knock resistance. Depending on the composition of the fuel, the MON of a modern pump gasoline will be about 8 to 12 octane lower than the RON, but there is no direct link between RON and MON. Pump gasoline specifications typically require both a minimum RON and a minimum MON.
Anti-Knock Index (AKI) or (R+M)/2
In most countries, including Australia, New Zealand and all of those in Europe, the "headline" octane rating shown on the pump is the RON, but in Canada, the United States, Brazil, and some other countries, the headline number is the average of the RON and the MON, called the Anti-Knock Index (AKI), and often written on pumps as (R+M)/2). It may also sometimes be called the Posted Octane Number (PON).

^^ Thanks Arvid for the detailed information and explaination- seems interesting and a fair bit to it!

Since they mention catalytic converters, I would assume it is perfectly fine to use in a four-stroke.