Skiphreak

Hey all, Frequent lurker - seldom poster. Hoping for some help- 2004 Malibu Response lxi - experiencing low oil pressure on start-up and continuing until engine comes up to running temp (around 160F). Dash gauge displays oil pressure hovering around 20 psi and if I accelerate at all beyond 1500 rpms, it will nosedive below 15psi and set off alarm. Once up to running engine temp (160F), oil pressure eventually comes up to normal (40psi) and runs smooth. Oil level fine - was changed around 20hrs ago. Has happened consistently the last three or four times out. I’ve read on some of the Malibu boards that it could be the sending unit. Thanks for the help in advance. An aside - took up slaloming around 2 years ago and this site has provided endless informative information and institutional knowledge. A great resource and devoted community. Thanks!