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Some of the old timers I flew with had this answer for the oil qty mystery. When the oil is hot and expands it will rise up into the filler tube and when shut down if the fill cap is sealed it will hold the oil there as there is no vent in the tube to let it drain down until you open the cap to check the oil level. All engines that use the oil sump with the filler tube will do this such as the C-150. Sam Phillips 93515 On Feb 14, 2004, at 12:51 AM, Tim and Martha Briggs wrote: > ----[Please read http://ercoupers.com/disclaimer.htm before following > any advice in this forum.]---- > > > Hmm.. > > The responses are interesting. > First, I find it hard to believe that oil "creeps up" the dipstick. > That > defies all laws of physics. The oil had to reach the indicated level > at > some point in time. Maybe a sharp turn to the left on the ground could > slosh the oil enough to give you the false high... > > Second, I also have to believe that most of the oil in the filter (I > have > the spin on STC) drains down into the tank since it is higher than the > tank. > > I think the only way to be really sure is to take the two measurements > cold > and then the two measurements hot. Then, drain the oil tank and > measure how > much is actually in there. > > OR Drain out the oil really well and then put in 4 quarts and measure > where > it marks the dipstick,then 5 then 6. > > One other consideration is the tube that comes out of the tank > containing > the dipstick. Its diameter is pretty tight compared to the tank. IF > my > heat expansion theory is correct, a relatively small rate of expansion > would > be amplified if the oil rose high enough to actaully enter the tube. > > I wrote an email to Shell asking how much the oil expands > volumetrically > when it gets heated up. If they respond, I'll share their response. > > Tim > > > ======================================================================= > ======= > To leave this forum go to: http://ercoupers.com/lists.htm > Search the archives on http://escribe.com/aviation/coupers/ > > > ========================================================================== ==== To leave this forum go to: http://ercoupers.com/lists.htm Search the archives on http://escribe.com/aviation/coupers/
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