The national average cost of diesel is unchanged this week from last week, but it continues moving higher south of the border.

New figures released Tuesday by the petroleum information service provider The Kent Group show its at $1.125 per liter, the highest level since late March. 

Compared to the same week in 2014, the price is 24.6 cents per liter less.

In contrast, the average cost of regular grade gasoline increased 0.6 cent from last week for a national average of $1.136 per liter.

This is the second highest level so far this year but is 22.4 cents less than a year earlier when the average was $1.36 per liter.

Meantime, in the U.S., the national average cost of on-highway diesel increased on Monday for the fifth consecutive week, hitting its highest level in two months.

It added 2.6 US cents from last week for US$2.904 per gallon, according to the U.S. Energy Department. All the increases combined over the past five weeks total 15 US cents.

Despite the gain, the average cost of diesel in the country is US$1.03 less when compared to the same week last year.

Prices increased in all parts of the country from last week, with the West Coast having the highest regional price of any part in the country, US$3.162 per gallon, while the least expensive regional price is in the Midwest with an average of US$2.791.

The average U.S. cost of regular-grade gasoline also moved higher over the past week, 5.3 US cents to US$2.744 per gallon, its highest level since last December.

Compared to this time last year, the current price is 92.1 US cents less.