Hi Paul:
I hope the headset is working properly for you. At any rate the
reason for this post is my experience with oils and engines here at
Truckee, CA.
I had been using Shell 15W50 semi synthetic in an O-470G Cont. for
the last many, many years, with easy starting in the winter and no
problems. So.... when I got the coupe I switched from the Shell 100W
that had been used in the O-200A Cont. to 15W50. I should add that I had
never done an oil analysis on the O-470, and the O-200 had only been run
55 to 60 hours spread over 8 1/2 years from MOH.
Maynard.
----------------------------------------------
Subject:
RE: Oil analysis
Date:
Tue, 17 Aug 1999 16:40:29 -0400
From:
John Cooper <[EMAIL PROTECTED]>
To:
[EMAIL PROTECTED]I've been doing oil analysis on every airplane engine I've owned for the last 15 years. It's a long term thing. One reading usually won't tell you much, unless you're in deep doo already. The thing is the trend. If you get similar readings every time, things are usually pretty OK. If after a couple of years, you suddenly see an increase in some wear metal, you know something's changing. There are a number of labs that do oil analysis. Most of them get most of their business from the heavy diesel industry. They are more set up for telling if the oil is good than the engine. (Long haul trucks,and powerplants, ocean liners and such change the oil when it begins to deteriorate.) You've probably already discarded the oil and care more about the condition of the engine. Now the unsolicitated testimonial: Howard Fenton runs a small analysis lab in Tulsa, OK. He specializes in aircraft engines; that's all he does. His prices are competetive and he's seen it all. You can reach him at mailto:[EMAIL PROTECTED] He'll send you a free sample mailer on request. Best deal is to prepay for 5 or 6. I do mine twice a year or every oil change until the engine has 100 hours. Disclaimer: I do not work for Howard Fenton. We have never met in person. He only knows me because he does my oil analysis and I send everyone I can his way. I pay the same price as everyone else. John ----------------------------------------------- Subject: Re: Oil annalysis Date: Tue, 17 Aug 1999 16:53:10 -0700 From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] John Cooper wrote: > Now the unsolicitated testimonial: Howard > Fenton runs a small analysis lab in Tulsa, OK. He specializes in aircraft > engines; that's all he does. His prices are competetive and he's seen it > all. You can reach him at mailto:[EMAIL PROTECTED] He'll send you a free > sample mailer on request. Best deal is to prepay for 5 or 6. I do mine > twice a year or every oil change until the engine has 100 hours. > > Disclaimer: I do not work for Howard Fenton. We have never met in person. > He only knows me because he does my oil analysis and I send everyone I can > his way. I pay the same price as everyone else. Same guy/same schedule I use. I concur with the above. David. ------------------------------------------------------- So based on the above I wrote to Mr. Fenton. ------------------------------------------------------- Subject: Re: Aircraft oil: Date: Sat, 21 Aug 1999 14:20:15 EDT From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sample kit is on the way. For your engine I prefer 100W oil. Howard Fenton ----------------------------------------subject: Re: 100W vs 15W50 Date: Mon, 23 Aug 1999 15:23:17 EDT From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Maynard, I don't like the chemistry of 15/50 or 100W Plus. It is known to attack copper. If you want a multigrade, go with Phillips XC (20W/50) I have used it for years in my Tiger and am pleased with the results. Howard ------------------------------------------subject: Re: AVblend: Date: Tue, 24 Aug 1999 14:42:05 EDT From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Maynard, Avblend won't hurt anything and is known to help valve sticking in little TCM's. Howard -------------------------------------- To try and make a long story a bit shorter, the oil analysis report showed normal excluding tin and copper. The second report showed tin OK and copper down by 50%. I have not done the third sample yet. However I did speak with Mr. Fenton on the phone after receiving the second report. And his response was that there was no reason to stay with the semi synthetic, because it was not appropriate to aircraft engines. So I am in a quandary as to stay with the Shell or to switch to the Phillips XC. There is no question about staying with the multiviscosity oil, just which brand. Oh, one thing more. the time on the the first sample was 36 hrs, and I changed oil and filter. the second was 28 hrs, and I did not change oil or filter. I am going to run the Shell 15W50 for a bit longer and take a third sample when I dump the oil and filter. At that time I will decide what to do. My gut feeling is that I will probably change to the Phillips XC 20W50. I hope that is confusing enough for you: Maynard.
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