MARK HEWITT, PVM Oil Futures, London (7:30 am EDT): Brent crude up at $25.78, gasoil up at $202.50 in carryover of late US rally yesterday following bullish API, Dept. of Energy inventories data... WTI up at $26.26 on Access, while heating oil up at 65.95 cents, gasoline up at 81.35 cents... focus on tight supply situation as US refiners scramble against some refinery problems to increase gasoline output before summer driving season... Middle East tensions, Venezuela political instability helping.