Brent gained 31 cents, or 0.4%, to $89.32 a barrel, WTI rose by 23 cents, or 0.3%, to $83.80 a barrel.

Brent traded 27 cents higher at $87.27 a barrel, WTI gained 26 cents to $82.16 a barrel.

Brent slipped 56 cents, or 0.62%, to $89.46 a barrel, WTI fell 63 cents, or 0.74%, to $84.73 a barrel.

Brent climbed 51 cents, or 0.57%, to $90.25 a barrel, WTI rose 61 cents, or 0.72%, to $85.63.

While Urals has been above $60 almost all year, this month’s surge to well above $70 will stretch the credibility of those attestations for traders wanting to keep using western services.

Last week, OPEC+ said it would maintain its voluntary cuts until July. The cartel is expected to decide on its continued production cuts beyond then at its next full ministerial meeting scheduled for June 1.

Russia observed “sustained positive dynamics” in the flow of money to the federal budget, according to a Finance Ministry statement on Monday. Revenues for the three months through March amounted to 8.7 trillion rubles ($94 billion), an increase of 53.5% compared with the same period last year, data from the ministry showed.

Brent dropped $1.42, or 1.6%, to $89.75 a barrel, WTI was at $85.59 a barrel, down $1.32, or 1.5%.

Brent rose 20 cents, or 0.22%, to $89.12 per barrel, WTI climbed 17 cents, or about 0.2%, to $85.32 a barrel.

Brent rose 23 cents to $86.98 a barrel, WTI climbed 28 cents to $82.23.