tag:blogger.com,1999:blog-10000144.post8711887131816188359..comments2024-03-13T09:47:40.487+00:00Comments on Cockpit Conversation: Slow StartAviatrixhttp://www.blogger.com/profile/13634111275860140084noreply@blogger.comBlogger9125tag:blogger.com,1999:blog-10000144.post-27737883758302371922009-01-27T14:17:00.000+00:002009-01-27T14:17:00.000+00:00@A Squared: I guess I should have said I'm in Cana...@A Squared: I guess I should have said I'm in Canada, so there is at least one :)<BR/><BR/>Most of my neighbors on the field also seem to use multi-viscosity oil. Phillips being a popular brand as well. <BR/><BR/>But there is nearly a $2CAD/qt premium on the multi-vis. So, I can see if you have many planes, with two engines, flying a lot and doing oil changes, and you're paying pilots who can babysit the plane and keep it warm, it can add up pretty quickly.nec Timidehttps://www.blogger.com/profile/03017143602023726206noreply@blogger.comtag:blogger.com,1999:blog-10000144.post-22162375307272708542009-01-27T05:05:00.000+00:002009-01-27T05:05:00.000+00:00Maybe Canada's different, but there's a great many...Maybe Canada's different, but there's a great many piston engines run on Multi-viscosity oil in the US. When I was flying hte DC-6 we used A multi-vis oil, Phillips IIRCAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-10000144.post-85695254080763851122009-01-26T23:30:00.000+00:002009-01-26T23:30:00.000+00:00I use (and have for several years) AeroShell 15W50...I use (and have for several years) AeroShell 15W50 which is a synthetic blend multi-weight oil, unless we are breaking in parts (cylinders and rings) when we use AeroShell 100 which is single weight (SAE 50) and not synthetic. The multi-weight oil does ease winter starts a bit but a recommended oil for automobile engines for a Canadian winter would be 5W30. So, even though cold 15W50 would flow better than straight SAE 50 oil, it won't be anything like as easy to pump around as the oil in a car at the same temperature. Conventional wisdom is that synthetic oil is too slippery to give a good break in. I don't know about that, but when the parts supplier and mechanic (both of whom I'm paying many dollars to) agree, I figure I should take their advice.<BR/><BR/>The nnW is the winter, or cold weather SAE rating of the oil and (from what I've read) indicates the viscosity of the oil at 0F. If you are always going to keep your engine and oil warm, then the advantage of multi-weight oil goes away.<BR/><BR/>BTW I use AeroShell only cause there is a bulk dealer near me that will sell me oil by the case at a significant saving.nec Timidehttps://www.blogger.com/profile/03017143602023726206noreply@blogger.comtag:blogger.com,1999:blog-10000144.post-88982081837440785162009-01-26T22:49:00.000+00:002009-01-26T22:49:00.000+00:00A Valvoline rep once told me that synthetic oil in...A Valvoline rep once told me that synthetic oil interacts poorly with leaded gasoline, and will cause the lead to pool, clump, and form deposits. (Take that for what it's worth.)dpiercehttps://www.blogger.com/profile/03397601206317363858noreply@blogger.comtag:blogger.com,1999:blog-10000144.post-18001630028611106382009-01-26T22:35:00.000+00:002009-01-26T22:35:00.000+00:00Mark, I'm sure you meant synthetic oil. I don't kn...Mark, I'm sure you meant synthetic <B>oil</B>. I don't know, and perhaps some newer engines can take advantage of the greater temperature range of synthetic oils. I've never had an aviation mehanic use or recommend a synthetic grade so there must be some technical aspect of the older engines that doesn't accommodate them.Aviatrixhttps://www.blogger.com/profile/13634111275860140084noreply@blogger.comtag:blogger.com,1999:blog-10000144.post-79706585131007566032009-01-26T20:04:00.000+00:002009-01-26T20:04:00.000+00:00Thanks for the excellent description of why engine...Thanks for the excellent description of why engines don't like the cold. I have often wondered why aviation engines don't use synthetic fuel that does not loose any viscosity when the temperature drop. <BR/><BR/>MarkAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-10000144.post-23376690352039864862009-01-26T19:36:00.000+00:002009-01-26T19:36:00.000+00:00I don't know how you folks carry on at -20C. I've...I don't know how you folks carry on at -20C. I've said that before. The cold eats starters, batteries, and engines.<BR/><BR/>Yesterday, it was -7C, but with a -14C wind chill, in upstate NY when I needed a preheat. I have a portable combustion pre-heater that I use, but yesterday I was counting on the FBO for a pre-heat. <BR/><BR/>They have one of the trailer-mounted Herman-Nelson heaters you talked about. Scary beast it is. Makes some terrible noises when it starts up.<BR/><BR/>That's if it starts. Theirs is powered by a Diesel engine, go figure. Anybody who's tried to start a cold-soaked Diesel knows how hard it is. Anyhow, after 15 minutes of cranking and spraying starting fluid into the air intake, they got it started. I think the comment was that it ran fine a couple of weeks ago... Mostly they service jets. I'll bet the GPU starts ok. *sigh*<BR/><BR/>--paulAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-10000144.post-27699783438143716042009-01-26T03:11:00.000+00:002009-01-26T03:11:00.000+00:00brrrrrr..... where are me MITTS! TOUQUE! HOT RUM!!...brrrrrr..... where are me MITTS! TOUQUE! HOT RUM!!!<BR/><BR/>Great writing - thanks.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-10000144.post-12736339565500186672009-01-26T01:59:00.000+00:002009-01-26T01:59:00.000+00:00Cool story, literally! I don't envy you at all fum...Cool story, literally! I don't envy you at all fumbling around in -20. I've had similar problems with ground equipment but rarely in anything cooler than -5, with a bit of wind. Murphy's Law ensures that on these cold days things go wrong more often.Dispatcherhttps://www.blogger.com/profile/18143587383561774168noreply@blogger.com