Group, The mix of 1 ounce per gallon works
out to 128:1. 5 ounces per gallon is therefore
25.6:1. Most modern 2 strokes use a premix
ratio of around 40-50:1 using preimum oils.
We should need not more than that, 50:1, and
more likely the 100:1 level with a good 2
stroke oil. The 1 ounce per gallon seems to
be working for most people. We ran 2 ounces Redline
per gallon in our RX-3 sedan racer, a 64:1 ratio
with NO engine problems. When we tore down the
engine to check it at the end of the season it
was clear the engine would have run 10 seasons
without teardown. We were running in a stock
engine class.
Bill Jepson

 
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