alright so today I was driving and I noticed that my oil pressure was funky. It was only running at about halfway to 40. it usually runs at 40 and then goes up alittle as I drive. Duh. But today I was going to get gas and noticed it like that, then when I started it back up to leave the gas station, it was reading zero. THEN igot home and took a look and it went normal again. I just replaced the sending unit 'cause it was spewing oil. could it be the gauge or do you think my oil pan is shot? I am due for an oil change though too.