问:低油PSI

我买了05年日产Altima Se-r几个月回来。它有一个v6 97555英里的3.5升发动机。我在94949年有一个换油。最近我注意到当我启动汽车ψ是大约90。后开车3 - 4英里psi下降至约30但当我的rpm将达到60 2000。我主要担心的是,当我停在停车标志或红色的光,psi下降为0,我光油来了。一旦我加速轻轻psi跳回到大约30。第一个发生在大约两个星期前。我检查油位后,水平好。我今天又检查了一遍,水平很低。 I know I'm due for an oil change soon, but I wasn't sure I'd that would be the cause of the problem or if it's something more serious, I'm thinking oil pump or possibly catalytic converter. The only reason I say catalytic converter is because my exhaust fumes have also been smelling terrible since this has started. Thanks, Roger

我的车有97555英里。
我的车有一个自动变速器。