I've read that the electronic pressure sensor is pretty unreliable. According to my sevice records mine is about 20k old. How long do they last before they get unreliable? Cold it goes to 90+ but hot idling it can be only approx half way to first mark therefore 15psi. I get nervous when it looks low. Now using full synthetic. Any others with similar exp?

 

Both my Z's have the same 'problem'.

Although you have to get the engine very hot (drive hard) to get it below 15 at idle.

When cold they both have 90+ PSI.

Since both my current Z's (and my previous Z) had this problem, I guess it's normal.

 

-Eric