The higher the compression ratio, the higher the octane needed to prevent detonation...the M715 stock has LOW ompression, 7.5:1...87 octane works just fine. I don't think high octane in such a low compression engine would give additonal power...maybe very slight but doubtful.
On the lead additive, the 230 has hardened seats and does not require the use of leaded fuel or additives for lead.
The 85 octane...on the interstate in Indiana I saw that...the low octane rating is basically a way of saying it will run on anything that is gasoline...down to the lowest octane...any pump in a storm...this is due to the low compression...if you were in some foreign country and could get gasoline...it would run on it...thats why the ratio is so low I think...civvy engines came in 7.5:1 and 8.5:1...mil only the 7.5:1 types.
Lord send your Holy Ghost into our hearts and make the desire of our hearts Your Will.
Pro-choice, that's a LIE, babies don't choose to die!!