<HTML><FONT FACE=arial,helvetica><FONT COLOR="#8000ff" SIZE=2 FAMILY="SANSSERIF" FACE="Arial" LANG="0">Earl<BR>
I recently had the same problem.<BR>
I poured one ounce of fuel in a graduated one ounce mixing cup and heated it with my monocote blower, that didn.t work to well so i let it sit in the heat for about a week and sure enough what was left was 20% I had a lab run a gravity on three samples one of the suspected fuel one of fuel that was supposed to be 35% Nitro and then added enough nitro to the first sample to bring it up to what I calculated would be 30% Nitro. Then we ran a gravity on pure Methanol, pure Nitro. and the Oil that I had evaporated the Nitro and Methanol out of, The Methanol came out . 84 ccm Oil was 1.011ccm and Nitro was 1.131ccm.<BR>
API Gravity of the first fuel which worked out to be 15% Nitro was 19.4 the second sample which was supposed to be 35% but calculated out to be 27% was 18.1 and the third sample after Nitro was added and calculated to be 37.5% was 16.8.<BR>
I don't know if our results is totally accurate but we came up with the following weight's per gallon.<BR>
Plastic Jug wt. 5oz<BR>
15% Nitro 20% Oil-----=7lb 14.2oz including the jug<BR>
20% Nitro 20% Oil-----=8lb 0.2 oz ditto<BR>
30% Nitro 20% Oil-----= 8lb 4.2 oz ditto<BR>
>From these results all things being equal it looks like each 5% of Nitro added will increase the weight of a gal. of fuel 2oz assuming each jug contains an equal number of ounces (128per gal).<BR>
I hope this helps.<BR>
Buddy</FONT></HTML>