AeroFinn
Posts: 152
Score: 100
Joined: 6/13/2007
Last Login: 5/24/2013
From: Turku, FINLAND
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quote:
ORIGINAL: WimB
I've been using Aerosave ever since it came on the market, and I used Aerosynth and Aerosynth2000 (biodegradeble) before that. I think in all, I've used these oils for about 15 years now.
Ever since I switched to aerosave, I have made 3 mixes: regular 2 and 4 stroke, heli, and Ducted fan.
the mixes areas follows: Regular 13%, Heli 18%, and DF 22%, all with 10% nitro.
I have some four strokes (OS FS 91 Surpass) that are more than 10 years old, and they still perform as the first day, even though one of em is on my most favorite take-it-along-every-time plane (
Chriss Foss Wot 4 MKIII Classic). Other than replacing the bearings every 2 years or so, I hardly ever touch them. haven't had a flame-out in longer than i can remember, no tingling with the needles or tinkering with the valves. Actually, I had one of these engines that was put away for over 2 years, not preserved or anything. recently I put the plane bachk in service, fueled it, started, and flew without even adjusting it. I assure you that these look like new inside, no residue, shiny piston, clean valves (exhaust just a little blackened).
The only time I'll use castor, is actually for running in, since aerosave is so good, it would take forever to get the engine run-in properly. as mentioned before, Fuchs used to market a special run-in oil.
And when it comes to running hot, I doubt any engines ever run hotter, and are more ''abused'' than DF engines. I had one OS 91 VR-DF (running a dynamax at +22K rpm) burn a hole in the piston on a lean run once (well, nearly at least), so it must have run pretty hot..... despite this, it didn't seize, piston and sleeve were hadly scored, and there was no other damage to it. It actually stopped because the plug filament burned away (and this is probably why the piston got scored.....) The European DF scene used almost exclusively aerosave, so this must account for something, no?? I was told the higer oil contents for heli and DF were primarily for extra cooling purposes. Anybody want to do the test? Try running a DF combo, 22K rpm, on a mix with 22% castor, and see how long it'll last....
To me, this is the only oil I'll ever use!
Regards,
Wim
Hello Wim
I know this is an old thread but just in case you see this post
Have you tried the Aerosave 3 oil which is the newst oil in the Fuchs Aero*** range. It's viscosity index is said to be even higher than that of the Aerosave. The Aerosynth 3 is, however, a low viscosity oil so this makes me wonder how well it protects the engine in a lean run..
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RE: Fuchs Aerosave - 
