I would think Ben due diligence would indicate they would handle this testing in-house or via a competent consulting agent , No ? I saw enough Kawaski Engine Ltd Dyno testing back in Grand Rapids in the late 70,s during my Snowmobile Racing days . Not all that hard to analysis nox emissions lol.
I feel for you Termite , however Ben has gone to the trouble of creating a rather concise explanation of the combustion process and the latent energy or btu,s more precisely that ensure efficient vaporization of a 2 cycle fuel charge . I believe we all realize that the actual fuel is a cooling effect agent . Actually 80 % fuel approx 20% combustion air , since a engine is a air pump primarily . Unfortunately the vaporization of fuel & oil due to density are vastly different therefore residual oil remains as the fuel flashes off to as Ben has advised , important internal engine components to provide the necessary lubricity ( I can hear Andre Chuckling ) . This is where we differ I believe ? Ben & I have stated that ester based synthetics are far superior within providing this lubricity within the engine at lower viscosity to provide maximum protection with no or minimal carbon forming deposit potential , due to their formulated homogenous additives . However I agree with you also in principle , that numerous other mineral based oils are more than adequate for extended saw usage applications especially Group II & III oils . There are also as previous mentioned by another forum member metallurgical structural changes as to Nikisil cylinders vs former Chrome Plated and tighter piston to cyl. Specs which effect heat transfer coefficient changes that have required these oil upgrades , combined with more stringent EPA guidelines . Sorry for the lengthy dissertation , actually can,t compare to Ben in that category , since i,an not a former Chemical Engineer as Previously advised ....Peeps !
And how would you know?
I am sure Belray oil doent combust. Thats why its dirty junk. That's not to say modern ester formulations are not designed to combust. Indeed they are.
You are comparing the ability of castors and some esters to mix with ethanol or methanol fuel with the ability of the same oils to resist being wiped off the cylinder walls by the solvency of both alcohols.
Not sure Ben , thus the ? within 2cycle inhouse testing . I would presume that any million dollar company would protect them selves from libel suits. As for Nox testing sorry , this testing is more prevalent within Diesel Engines that can produce extreme temps over 1300 Deg . F and require intercoolers . Much as auto,s utilize EGR systems . Poly Aromatic Hydrocarbon (PAH) or more precisely Poly Cyclic hydrocarbon (PCH) testing may be more accurate within 2 cycle emission testing Protocals ? Not sure not a Chemical Engineer or Emissions Anaylist for the 2 cycle small engine Industry , however I do have 1 st hand real world experience within the Integrated Steelmaking Process. As to where our multiple Industrial 10 kilowatt Package Boilers were heavy producers of Nox emissions due to their fossil fuel dependence of Heavy C fuel blended with Natural Gas Injection . Abatement equipment were normally rather prohibitive !
well that would be my assertion Ben , they mixed rather well for the technology castor allowed at relative ambient temps and were quite stubborn to remove from cylinder walls " cling " under extreme temps . I recall the gunk coating all top end components including the lower crankshaft and bearing assemblies during decarbonizing tear downs , which I feel is the same integrity premium ester class syn Group III , IV & V oil provide within 10% Ehanol fuel usage today .
Well all I can say is I trust you call on that . How say you on my 10 yrs of non incident issues with Amsoil Sabre on various relatively modern former saws including Stihl MS 260 , 360 , 660 . Husky 288 xp , 357 xp & Vintage Pioneers you are already aware of and my newer Husky 576 xp , 243 xp , 346 xp & current new Dolmar 5105 H all fueled with Non Efuel ?
Maybe it's great oil. Maybe you got lucky. Maybe you havent accumulated enough hours to tell.
Yes , it does sound bizarre when you mention it like that , however it worked for the short duration racing application then in competition . Perhaps my old age is catching up with me on the Castor situation , for other than extreme event usage . I think you have converted me Bro , off to Bed for this old-timer , thanks for the patience and enlightenment !
Ethanol is naturally a pretty powerful solvent and it will wash any oil of cylinder walls. At 10% as is blended in most gasoline it isnt a catastrophic issue. When using it at 100% it can be, which is why guys that run ethanol and methanol use oils that are ester or castor based that are designed specifically for alcohols and they also tend to run much higher concentrations of oil as well.
well yeah I mixed the caster at 16:1 normally back in the day , prohibitive today and counter productive and a definite step backwards as you have indicated Cudo,s Bud !
As it pertains to solvency the differance between gasoline and ethanol is the fact that gasoline vaporizes at much lower temps than ethanol. Thus with straight gas and a warm engine there is very little liquid present to wash oil off wear surfaces. It's for this reason that if you tore a motor down immediately after you shut it off you would find no appreciable amount of gasoline in the crankcase.
Correct, I understand that. When you try and start an engine by squirting fuel down the carburetor, I always use mixed fuel, to prevent the possibility of washing down the cylinder walls. Which is the main scenario I was referring to.
Yes only for cookie cutting. Ran ST for a few tanks in a work saw once just as a test, made a mess, as expected.
