March heating oil prices grinded higher during the early morning hours, boosted by a rebound in risk-taking sentiment and weakness in the US dollar. Added support this morning might have come from December international air travel that increased 6.4% compared to year ago levels. The International Air Transport Association also noted that passengers traveling international routes in 2011 were up 6.9% compared to 2010. Expectations for this morning's EIA distillate inventory report call for a draw of in the range of 1.25 to 1.5 million barrels.