US light crude for May delivery rose 10c to $51.15 a barrel by 04:49 GMT, having settled $1.46, lower on Monday.
London Brent crude rose 7c to $52.31.
Renewed worries about the banking industry that hit equity markets also lifted the US dollar as a safe haven, putting further pressure on oil prices that have been tracking shares closely in recent weeks as a gauge of economic sentiment.
Little upside is expected from weekly US inventories data, with oil analysts predicting yet another increase in crude stocks because of high import levels and weak demand from domestic refiners.
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Author: Ksenia Kochneva
