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On 7 Nov 2005 at 14:47, Dan Hoopes wrote: > re: pressures: at what pressure should i worry that it's too low. at > 6 psi? Bumping down to 6psi at hot idle is not so unusual. At any usual driving rpm I'd expect it to be at least 18. Above 25 I'd say that you have no worries at all. > also, if i can trust my temperatures coming from my oil temp gauge, at > what point should i worry? You can't trust any gauge you buy unless you calibrate it yourself. My understanding is that they all tend to be poorly calibrated, so they are really only good for relative measurements. > same for head temps, what is the worry number? the sender is on spark > plug hole number 3, held in by the spark plug. it stays at about 350. > gets there quick and then stays pretty constant, regardless of oil > temp creeping up. So you have 2 temp gauges? That should give you some interesting data. It's also interesting that the head temp is constant as the oil temp rises. Did you see any change in head temp when you switched to synthetic oil? If not, I'd say that there must not be a problem. Others here probably know more about what safe head temps might be, but again you have to worry about your calibration. > if i want to change back to dino oil to check the numbers, can i just > do it willy nilly? I don't think there is any problem with mixing. If you're trying to do a test, I'd change the filter at the same time, just to make your data as valid as possible. -- ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA ******************************* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~