Yeah let us know how you get on with the AeroSynth 3 and where you get it from and how much it costs

I may be moving for long periods soon to south Europe and and AeroSynth 3 is reputidly a more popular oil to be found there than EDL or ML70
I think that's because most of them order it from Graupner

One issue to watch is very low oil content like 10% with low nitro or Zero nitro fuel can make the firing sequence advance a tad for some engines and this will mean that although the engine may have eneogh oil to lubricate the engine the engine can be getting hot from pre detonation effects in long runs where WOT is used

The Simplist solution is running the engine richer will supply more fuel and fuel has a large cooling effect from the energy needed to vaporise it which draws the excess heat from the engine which works well for lots of sports uses

Putting in higher nitro methane often cures this as this will often retard ignition and nitro methane has a larger cooling effect as the volume of it is greater compared to methanol and draws of lots of heat from vaporization and for 3d work where ~1/3 to 1/2 throtle is used a lot that is the favoured solution

Putting in higher oil cures this as this will often retard ignition and oil has a cooling effects

As oil is often much cheaper than nitro and often less than 1/2 the price of nitro methane lots of guys opt to increase the oil content if the engine is going to be WOT all the flight as that is a cheaper solution for retarding ignition compared to increasing nitro levels

Other solutions exist of like differrent glow plugs or smaller or different props through to ram air cooling in cowling covers and mixing acetone into the fuel or mixing water into the fuel etc


Some guys drop a lot below 10% oil but I suspect they have to richen engine way to much to keep the engine cool and cancell out the oil saving or are running engines with very low compression or very low powered sports stuff on ~1/4 gas

I don't think less than 6% oil is possible as the con rods bushing will starved of oil below that

Best I can tell the schools of thought go from 10% to 15% synthetic ester oils with it rumored the Japanese 3D heli team use 10% oil synthetic Ester oils only and 3D heli is a severe enviorement

So for me I use 18% running in dropping to 15% and then after that when run in 10% and if engines in very hot summer days show signs of excessive heat I will bump up the nitro from my normal 5% to 10% or 15% but haven't had that issue yet


Balsaeater