Question 1080032
Set up a ratio using the same units of measure
for both the oil and the gasoline
Use the conversion:
16 ounces = 1 gallon
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The ratio looks like:
[ ounces of oil ] / [ ounces of gasoline ] = 
[ ounces of oil ] / [ ounces of gasolinw ]
Let {{{ x }}} = ounces of oil needed
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{{{ 1.8 / 16 = x / ( 3.24*16 ) }}}
{{{ 1.8 / 16 = x / 51.84 }}}
Multiply both sides by {{{ 16*51.84 }}}
{{{ 1.8*51.84 = 16x }}}
{{{ 93.31 = 16x }}}
{{{ x = 5.83 }}}
5.83 ounces of oil are needed 
for 3.24 gallons of gasoline
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check the math