It’s getting cheaper by the week to heat a house in Maine.

No. 2 oil – the fuel of choice in roughly 80 percent of the state’s homes – fell in price by 2 cents over the past week. It’s now averaging $1.89 per gallon statewide. That’s still 48 cents more than the commodity cost a year ago at this time.

The State Planning Office surveys oil dealers each week during the October-to-March heating season and provides its findings by e-mail to anyone who requests them.

The survey found that this week’s state average for kerosene – $2.16 per gallon – was also down 2 cents from a week ago. That average is 53 cents higher than kerosene was selling for a year ago.

Propane, the third heating source checked by the SPO, was averaging $2.05 per gallon, down a penny since last week but up 38 cents from last year’s price for this week in January.

Heating fuel prices continue to track crude oil trading on the New York Mercantile Exchange. Crude fell by 69 cents per barrel on average last week but remains $10.85 per 42-gallon barrel more than last year at this time.

Gasoline prices are also trending lower, again reflecting the decline in crude oil trading.

The Energy Information Agency, an arm of the U.S. Department of Energy, also released its weekly gasoline price survey on Monday.

The national average price for a gallon of gasoline was $1.824, said the EIA, which compared that figure to the $2.014 national average on Nov. 15.

In New England, a gallon of regular gasoline was averaging $1.828, said EIA, compared with $2.015 on Nov. 15.

In the Lewiston-Auburn area, gasoline was selling Monday at pump prices between $1.759 and $1.829 for regular at most stations.