---------------------------------------------------------- Engines-List Digest Archive --- Total Messages Posted Tue 10/12/04: 5 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 09:08 AM - Re: Re: Superior Vantage engine (Hinde, Frank George (Corvallis)) 2. 10:13 AM - Re: Re: Superior Vantage engine (Jack Steele) 3. 10:47 AM - Re: Re: Superior Vantage engine (Hinde, Frank George (Corvallis)) 4. 04:22 PM - Re: Re: Superior Vantage engine (Archie) 5. 07:39 PM - Re: Re: Superior Vantage engine (Garth Shearing) ________________________________ Message 1 _____________________________________ Time: 09:08:02 AM PST US Subject: RE: Engines-List: RE: Superior Vantage engine From: "Hinde, Frank George (Corvallis)" --> Engines-List message posted by: "Hinde, Frank George (Corvallis)" A message I cut and pasted from a different list. Anyone have any comments on using say Castrol 20W-50 in a Lycoming clone using auto fuel? Frank --> Zenith-List message posted by: "Paul Moore" At engine tech sessions at Sun-N-Fun this year, a Shell oil engineer advised that a minimum temp of 185 F was necessary to 'cook' out the moisture that collects in the engine innards due to condensation. Less than that and you decrease the life of the engine, and the effectiveness and life of the oil because the water is never evaporated. He also stated that sustained temps over 220 F should be avoided, because of the reasons Chuck shared below, as well as varnish formation, carbonization, and other heat related baddies. Another bit of information he passed on was that the formulation of aviation oils and the use of auto gas was a problem area. The additives in aviation oil are not necessarily compatible with the additives in car gas and that the by-products created by burning the car gas would break down the aviation oil before the recommended 25 hour oil change intervals. He didn't go so far as to recommend using auto oils in airplane engines burning auto gas (did I mention he worked for AeroShell?!), but I doubt there is much risk in doing that considering the high performance, high heat, high rpm engines in cars these days - the oil they use is likely durable enough to withstand aircraft engine stresses (primarily talking about Lyc's and Conty's - not necessarily auto engine conversions). Anyone out there running an A-65, 0-200 or 0-235 on auto gas? What oil are you using and do you have anything to share? Paul ________________________________ Message 2 _____________________________________ Time: 10:13:11 AM PST US From: "Jack Steele" Subject: Re: Engines-List: RE: Superior Vantage engine --> Engines-List message posted by: "Jack Steele" Hi, I have been using 87 octane auto fuel and aero shell 15-50 for 12 years. no problems found. change oil at 20 to 25 hours depending on utization during the year. Jack Steele W8 Tailwind C-90 ----- Original Message ----- > > Frank> Paul > > > > > ________________________________ Message 3 _____________________________________ Time: 10:47:28 AM PST US Subject: RE: Engines-List: RE: Superior Vantage engine From: "Hinde, Frank George (Corvallis)" --> Engines-List message posted by: "Hinde, Frank George (Corvallis)" I Should have been more specific I was thinking more about the IO360 I'm looking at. Thanks Frank -----Original Message----- From: owner-engines-list-server@matronics.com [mailto:owner-engines-list-server@matronics.com] On Behalf Of Jack Steele Subject: Re: Engines-List: RE: Superior Vantage engine --> Engines-List message posted by: "Jack Steele" Hi, I have been using 87 octane auto fuel and aero shell 15-50 for 12 years. no problems found. change oil at 20 to 25 hours depending on utization during the year. Jack Steele W8 Tailwind C-90 ----- Original Message ----- > > Frank> Paul > > > > > == direct advertising on the Matronics Forums. == == == ________________________________ Message 4 _____________________________________ Time: 04:22:54 PM PST US From: "Archie" Subject: Re: Engines-List: RE: Superior Vantage engine --> Engines-List message posted by: "Archie" > Anyone out there running an A-65, 0-200 or 0-235 on auto gas? What oil > are you using and do you have anything to share? > > Paul I built several "custom" high hp O-200's, and insisted they do not use mineral oil for break in, due to the parts and machining methods incorporated. One engine was run-in on my dyno, and needed no further time. On the subject of water formation due to condensation, there is no breather system as most would be familiar with. I incorporated exhaust augmented vacuum (with a check valve) in the crankcase which causes negative pressure when the engine is running. When the engine is shut down, there is little to no atmospheric venting which reduces condensation formation. This may not work well with conventional aircraft rings and wall preps that require a long break in period, as they do not seal well enough to take advantage. BTW, The oil stays clean for over 20 hours, and starts darkening around 23-27hrs. One of the engines also has an accusump oil pressure accumulator which insures oil pressure at all times, and allows the pilot to pressurize the oil system prior to engine startup. Nuff said, Archie Frangoudis, Archie's Racing Service ________________________________ Message 5 _____________________________________ Time: 07:39:26 PM PST US From: "Garth Shearing" Subject: Re: Engines-List: RE: Superior Vantage engine --> Engines-List message posted by: "Garth Shearing" Maybe not directly applicable but I use 94 octane auto fuel (compression ratio 9.6:1) and 15-50 oil in summer and 5-40 in winter. My engine is a modified Rotorway RW-100 (EFI) but only has about 50 hours on it. Oil has been changed twice. Garth Shearing VariEze and 90% RV6A Victoria BC Canada