Originally Posted by
pizzaguy
Ok, Completely hot engine, 190F on the Ultragauge (fan mod does not let it get any higher than that, about 1/2 needle width below halfway):
Idle: was 10-14 lbs on 0W40 now is 15-19 on 5W50
2050 RPM: was 32-34 lbs now is 41-44 lbs
Of course, as always - these are aftermarket gauge readings.
ON THAT NOTE: 180 - do you remember our discussion about my red roadster having 0-2 lbs of idle pressure? Well, as it turns out, it DID have a litte less pressure than this car, but this car showed 4-5 lbs........... UNTIL the gauge went bad. I ordered the SAME gauge and THIS car, like I said, now showed over 10 lbs. That gauge was defective - it read wrong below about 20 psi. And no, not hte sender, I have swapped senders and both the old and new show the same. It was the "head unit" that went bad and it was the "head unit" that was reading wrong.
It's a "Prosport" gauge. I still like them, cause they are cheap ($43 with sender and install kit) and are green like the XF's gauges.
Hi, gauges sometimes create more worry that their worth, you can turn an engine over a few times using a ratchet (with the heads off) and get plenty of pressure to circulate the oil and err make a mess, don't ask how I know this...lol, all to say even cold a few pounds of pressure and even low rpm's from the pump does move around 0-5 or 10w oil in an ample fashion, regardless of gauge reading.
regards