In addition to all of the above, there are actually different oil coolers (non-congealing) available for very low temp ops. We use Aluminum tape to provide decreased flow through the coolers if all else fails.. .. .In conjunction with good engine covers and preh-heat if you have it available, there are a number of good electric sump heat mats, that will save your engine. In addition to the various aircraft suppliers, NAPA sells a great one too! <img border="0" title="" alt="[Wink]" src="wink.gif" /> . .. .FAA <a href="http://www.faa.gov/ats/afss/newyork/WINTER-T.HTM" target="_blank">have some good info on cold weather ops here.</a>. . . . <small>[ 03 March 2002, 07:14: Message edited by: Cyclic Hotline ]</small>