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Dear William. I did the same observations you do. Hot in summer , close to red line, barely over 150 F in Winter. After investigating everything possible about engine oils and some burned engines in my old beetle I came to the following conclusion. Hot is not dangerous as long as you are using the right oil. Cold does not do too much. Yeah the boiling water thing. But Water boils at 100C at sea level. That are 212 ? F. Pretty close to redline.. 180 F translate to 82 C . A temperature where you have to be at altitude to make water boil. At the right altitude water boils even at 150 F degrees. Just fly high. The real killer could be hot oil. My German mechanik told me that after trying all kinds of oil he would use only single weight oil (30 HD ) for his engines . He installed a temperature reader in my Beetle ( because I toasted too many engines) and told me to pull over ones the temperature reaches 110 Centigrades which are 230 Fahrenheit. I did so and never burned an engine again ( I did not have to pull over though) . Single weight 50 Aviation oil gives you a little more safety margin here. But redline really means it. Till there - no further. Over the last hot weeks here in CA I reached red line not only ones, watched carefully the temp and knew I would not demand full power from that little gasoline eating sucker. Just climb more shallow. one can not really pull over - we know that. By the way . Every time I blew an engine in my Beetle I was using Multiviskose Oils. Changing to single weight solved all the problems. Hartmut William and Amy McElwee wrote: > ----[Please read http://ercoupers.com/disclaimer.htm before following any advice in this forum.]---- > > Here is a question which has interested me for awhile. How close to the red > line on oil temps can I get without risking damage to my engine? My POH > says the red line for my 85 Continental is 225. In hot weather I find that > it gets up over 200 to maybe 205. I begin to get nervous in climb when it > gets up there towards that red line on the guage. Meanwhile, in the winter > it tends not be get above 140. I keep reading in the aviation press that > oil experts say it should get to180 or it will not boil off the water vapor > even if I fly it often, which I do. This way lies corrosion. Should I be > doing something with baffling in the winter to get the temps up? > > Bill McElwee N3359H > ==^================================================================ EASY UNSUBSCRIBE click here: http://topica.com/u/?bz8Sid.bAhN69 Or send an email To: [EMAIL PROTECTED] This email was sent to: [EMAIL PROTECTED] T O P I C A -- Register now to manage your mail! http://www.topica.com/partner/tag02/register ==^================================================================
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