Just to be clear on this, if I plan to run 100ll in my covair powered KR2S then I should only use aviation oil? Anything else would be asking for trouble (lead deposits, rust etc.)? But if I use auto gas, I can run any oil I want? Ray
--- Doug Rupert <[email protected]> wrote: > > > Larry this one doesn't apply to you because I know > you are powered by an > aircraft engine and therefore already know what oil > should be used in it. > I've watched this oil thread and seen all the > varying replies. Some have > been close but others not so close. I worked for > Shell for years and can > state categorically that oil is oil, unless we get > into synthetics. The only > difference is the additives that go or don't go into > that oil. Oil itself > never wears out, it only gets dirty and loses it's > additives. That is why > they now recycle oil. They run it thru screens > layered with dyamacious earth > to clean it then put the additives back in and away > it goes for another > cycle of duty. Each and every builder will have > their own preference to > automotive engine oils and they will work out just > fine as long as the > following items are strictly adhered to. Changes and > inspection are thorough > and frequent and you NEVER run aviation fuel. Why > aviation fuel? Now we get > into the main reason, and there are several, why > aviation engines run > aviation oils. Aviation fuels have lead in it and > therefore require > additives to remove lead deposits from internal > engine components, auto fuel > does not have lead. Second, aviation engines usually > are subjected to > extended sitting between use and therefore must have > additives to promote > the oil staying on critical surfaces during these > times. Thirdly, aviation > engines are subjected to very severe temperature > changes in a very short > period of time. Larry just proved that with his > recent excursion. Say it's > 10 deg on the ramp, now figure out the OAT at 10,000 > feet and don't forget > to add in the windchill. Now you get the idea. Yeh I > know your oil temp > doesn't vary much but that engine block temperature > sure does. Anyone that > has a hard time with that one go stick your tongue > on a steel fence post at > 10 degrees and get back to me. Lastly, the > aforementioned temperature > changes can and often do create condensation inside > the engine after > shutdown so the oil must have additives to disperse > water from that > condensation. Well that's it folks aviation oil > versus auto oil. On a > personal note, I ran 20w50 Valvoline in my racing > Harley powered by straight > 100LL aviation fuel to know ill effect. BTW Harley > Davidson engine oil is in > fact 20w50 Aeroshell. So now the choice is back > where it began, up to the > individual builder and their particular operating > environments and > preferences. > Doug Rupert > Simcoe Ontario. > > -- > No virus found in this outgoing message. > Checked by AVG Anti-Virus. > Version: 7.0.296 / Virus Database: 265.6.11 - > Release Date: 1/12/2005 > > > > > _______________________________________ > Search the KRnet Archives at > http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to > [email protected] > please see other KRnet info at http://www.krnet.org/info.html __________________________________ Do you Yahoo!? Read only the mail you want - Yahoo! Mail SpamGuard. http://promotions.yahoo.com/new_mail
