What oil is best? and what ratio?

[RI Chevy]

I Gotta check my RA bottle and VP bottle.

 

[Keith Gandy]

I still say fuel is the reason some oils do what they do.

I've seen stihl ultra burn clean as hell and dirty as hell...why ?

I believe that statement

 

[Keith Gandy]

I still say fuel is the reason some oils do what they do.

I've seen stihl ultra burn clean as hell and dirty as hell...why ?

Id say on saws the lower octane will produce more carbon because its igniting sooner and combusting more completely and hotter

 

[mgr1]

Id say on saws the lower octane will produce more carbon because its igniting sooner and combusting more completely and hotter

If the fuel gets hotter due the lower octane number, than i think that you have less carbon buildup.
Carbon is mostley unburnd oil i learned on school. Hotter fuel, hotter oil.

Just my toughts...

 

[Keith Gandy]

If the fuel gets hotter due the lower octane number, than i think that you have less carbon buildup.
Carbon is mostley unburnd oil i learned on school. Hotter fuel, hotter oil.

Just my toughts...

Thats totally incorrect IMO and the majority thinks that way. How can liquified oil turn to carbon? Ive never seen oil poured on a table turn to carbon?Carbon is a byproduct of complete combustion and turns to carbon by complete combustion which takes heat. I know for a fact a saw with a low oil/fuel ratio say at 32to1 and tuned rich will stay cleaner than a saw ran at 50to1 and tuned lean will make more carbon. Been there and done that

 

[Keith Gandy]

A saw thats running cooler and running a low oil ratio and tuned rich will stay clean. So IMO running a oil thats hard to combust like Motul 800t and a high octane fuel along with a rich tune will stay cleanest. The oil wont combust completely, stay in a liquified state, and actually wash the piston and exhaust clean. All that at the expense of lost performance IMO

 

[mgr1]

What happend when you put oil on fire vs you burn oil with a propane torch?

 

[mgr1]

There was a few weeks ago in the oil topic someone that uses 2 stroke oil with no carbon build up on the piston and exhaust port.

On the bottle of this oil written: not for use in aircooled 2 stroke engines.

Watercooled engines get less hotter than an aircooled one. So this oil burns complete because it is not intented to use in an aircooled engine because of the engine and combustion temperature.

Same with the Stihl Hp oil. This gives more carbon build up if you mix it more than 50:1. So it dont burn complet.

 

[Keith Gandy]

What happend when you put oil on fire vs you burn oil with a propane torch?

Oil on fire burns and smokes and makes carbon(hydrocarbons)

There was a few weeks ago in the oil topic someone that uses 2 stroke oil with no carbon build up on the piston and exhaust port.

On the bottle of this oil written: not for use in aircooled 2 stroke engines.

Watercooled engines get less hotter than an aircooled one. So this oil burns complete because it is not intented to use in an aircooled engine because of the engine and combustion temperature.

Same with the Stihl Hp oil. This gives more carbon build up if you mix it more than 50:1. So it dont burn complet.

I disagree. Running a higher ratio, 50to1, and tuned leaner produces more carbon. Thats a fact . Lower the ratio to 32to1 and the tune say from 14800 to 12500 and the engine will produce less carbon. Like I stated previously , to make a byproduct of carbon you have to combust it completely and have enough heat,which in turn produces more energy/power

 

[Keith Gandy]

Using more oil as some folks think does not produce more carbon if its not combusting completely

 

[Keith Gandy]

There was a few weeks ago in the oil topic someone that uses 2 stroke oil with no carbon build up on the piston and exhaust port.

On the bottle of this oil written: not for use in aircooled 2 stroke engines.

Watercooled engines get less hotter than an aircooled one. So this oil burns complete because it is not intented to use in an aircooled engine because of the engine and combustion temperature.

Same with the Stihl Hp oil. This gives more carbon build up if you mix it more than 50:1. So it dont burn complet.

Thats incorrect. Using more oil in your mix does not produce more carbon . Just the opposite

 

[huskihl]

Oil on fire burns and smokes and makes carbon

I disagree. Running a higher ratio, 50to1, and tuned leaner produces more carbon. Thats a fact . Lower the ratio to 32to1 and the tune say from 14800 to 12500 and the engine will produce less carbon. Like I stated previously , to make a byproduct of carbon you have to combust it completely and have enough heat,which in turn produces more energy/power

I think this is more true with the certified fd oils and the added detergents within their formulas. I'd still bet that a richer tune or ratio with older type oils causes more carbon then a leaner tune at 50:1. Might be why the oil debate drags on

 

[Keith Gandy]

I think this is more true with the certified fd oils and the added detergents within their formulas. I'd still bet that a richer tune or ratio with older type oils causes more carbon then a leaner tune at 50:1. Might be why the oil debate drags on

Not sure about the old premix oils but I know from all the testing Ive done with FD oils the statements Ive made r correct

 

[Keith Gandy]

I think this is more true with the certified fd oils and the added detergents within their formulas. I'd still bet that a richer tune or ratio with older type oils causes more carbon then a leaner tune at 50:1. Might be why the oil debate drags on

Not sure Ill buy that even with the older oils either. Oil is oil and has to be combusted which takes heat to do. If its not combusting its not makin carbon and the more oil u have in a mix the harder its is for a short stroked motor as a saw has to combust it. The hotter the fuel burns, the less oil in the mix to combust, the quicker the combustion process starts as with advanced timing, the more carbon produced. I dont see how more oil will produce more carbon. If it isnt combusting its not making carbon. Theoretically it doesnt add up IMO Kevin

 

[mgr1]

Tomorrow i wil post a pic of a sachs dolmar 119 sparkplug. Thing runs on 40:1 semi oil, 98 octane fuel and tuned correct.

Oil stay's liquid if it not burns is told. So if its true you have lets say after a month daily runtime a crankcase full of oil.

If you after a certain time saving up oil in the crankcase, runs the machine on its side the oil blows thrue the transfers.
Up the combustion chamber, some out the exhaust en the rest of the oil hydro locks the engine and bend the conrod...

 

[Keith Gandy]

Heres a few ways to look at it. Inside a chainsaw muffler and exhaust u notice that u r rich and the oil isnt combusting and your muffler internal can, exhaust port, and muffler outlet are oily. Why does it not turn to carbon? It hasnt combusted because either there is too much oil in the mix , the tune is too rich, or there isnt enough load on the saw to heat it up and combust the oil.

 

[RI Chevy]

Is that bad for a saw Keith? Wet, oily muffler?

 

[Keith Gandy]

Is that bad for a saw Keith? Wet, oily muffler?

I dont think so. Its an indication of lost performance the way I see it

 

[Keith Gandy]

Tomorrow i wil post a pic of a sachs dolmar 119 sparkplug. Thing runs on 40:1 semi oil, 98 octane fuel and tuned correct.

Oil stay's liquid if it not burns is told. So if its true you have lets say after a month daily runtime a crankcase full of oil.

If you after a certain time saving up oil in the crankcase, runs the machine on its side the oil blows thrue the transfers.
Up the combustion chamber, some out the exhaust en the rest of the oil hydro locks the engine and bend the conrod...

The oil doesnt endlessly collect and stay in the crankcase. Only a certain amount migrates from the fuel to the bottoemend and the warmer the engine runs the excess is consumed. Its a total loss oiling system IMO

 

[Keith Gandy]

Is that bad for a saw Keith? Wet, oily muffler?

I like more oil over alil more performance. Currently Im running K2 at 32to1 in my Stihl FS250 trimmer with 93 Corn gas and its alil wet at the muffler opening but I feel comfortable with that