What oil is best? and what ratio?

[danimal]

Isn't that the same motor as a fs85? No spooge here.



Never heard that before.

Mix a gal. Put under a bench for 90 days.
Pour sum in a mason jar, and the mix color is almost gone..
Biodegradable, says so on the lil plastic bottle..

 

[jake wells]

Jake I burn 108 gallons of fuel in 7hrs today!! Can u top that??!!

doing what.

 

[PA Dan]

doing what.

I'm thinking moving some earth from here to there?

 

[jake wells]

I'm thinking moving some earth from here to there?

i know of a generator that can burn 420 gallons of fuel every 7 hrs.

 

[huskihl]

doing what.

I'm thinking moving some earth from here to there?

He runs a bigass cat dozer pushing wood chips. Maybe he'll post some more pics...






of his wife

 

[PA Dan]

He runs a bigass cat dozer pushing wood chips. Maybe he'll post some more pics...






of his wife

D9!

 

[jake wells]

He runs a bigass cat dozer pushing wood chips. Maybe he'll post some more pics...






of his wife

i thought he owned a dodge and that was the reason he burned that much in 7 hrs.

 

[Keith Gandy]

doing what.

D9 dozer. 60yds of pine chips up about a 100 yd stretch at about 20°. Pic. Is of bark fuel for a boiler

 

[Keith Gandy]

Hp2 didnt do too hot for me with a 241c makin adjustments. Saw ran wide open

 

[Wilhelm]

I've just spent all my Makita 2-stroke oil, going back to Dolmar 2-stroke oil.

Checked P&C condition on Friday, Dolmar PS-6400, had piston and piston ring replaced due to prior carbon scoring, cylinder got cleaned off all carbon deposits - she was on a Makita 50:1 diet since:



I like it, will have to source more Makita 2-stroke oil, and I'll continue using a 50:1 mix!

 

[sawmikaze]

Hp2 didnt do too hot for me with a 241c makin adjustments. Saw ran wide open View attachment 56683

What ratio ?

 

[Wilhelm]

Dolmar PS-7900 that was on Makita 50:1 diet, but she was fed other oil prior to the Makita oil, Dolmar oil at 50:1 by me and whatever the previous owner used:


Stock spark screen, has not been cleaned prior to taking the picture:


Inside the muffler:

 

[Redbull661]

high viscosity or low viscosity oil - my experince has been smaller saws (026, 261, 034, 361) don't run good at 32:1. Ran much better at 40-44:1. But those have only been stock.

my 064 and 661s on the other hand seems to like 32-36:1 the best.

...just what I've observed.

 

[Keith Gandy]

What ratio ?

Cant remember Ryan. Either 42to1 or 32to1

 

[sawmikaze]

Cant remember Ryan. Either 42to1 or 32to1

Ive ran it at 50 and it worked just tits.

 

[Keith Gandy]

Ive ran it at 50 and it worked just tits.

Ive ran a truckload of it in a YZ250 @ 32to1 but thats a different ballgame than a saw. I definetely dont like it better than RA or Klutz Kl200

 

[junkman]

.

high viscosity or low viscosity oil - my experince has been smaller saws (026, 261, 034, 361) don't run good at 32:1. Ran much better at 40-44:1. But those have only been stock.

my 064 and 661s on the other hand seems to like 32-36:1 the best.

...just what I've observed.

I have noticed the bike oils will not burn good in small piston ope also,weedeaters ms170 026 etc do not make enough heat to burn it .The bigger 75-90 cc saws are better at burning bike oil ,but i really think oil made for a bike is overkill for our saws though,i have been milling with same xp and saber i run in everything else and having no problems running hot.

 

[junkman]

I think some of the mixed results we see with the high temp oils are just due to how they are being run. If not run hard you get build up etc.

That is one of the reasons I like HP2 - it's a mid temp but high viscosity. So in my mind that would mean it would burn well when saw is idling and the high viscosity (18 vs something like ultra 8) will protect at max output.

that said my jury is still out until I do the oil test. I don't think it'll decide a ratio to use. But I think there will be a few oils which prevail as fastest and show a trend/pattern giving us an idea of an ideal operating temp.

I like what you are doing with the tests ,what i am thinking is what works in the 661 may not be ideal for your weedeater is my thinking.

 

[Keith Gandy]

I like what you are doing with the tests ,what i am thinking is what works in the 661 may not be ideal for your weedeater is my thinking.

I agree. The test should be a pretty good indicator of what mtronics will do with tese oilz but Id bet Autotune would be different. So far the Red Armor is doin well in my FS250, fS460, and HT250 but its also a OPE oil. I know the new HT250 polesaw will kick the socks off the HT100 polesaw I had in cut speed and torque

 

[Keith Gandy]

Heres a good read for the oils only job is to lubricate statement. Not all oils contain the same package as the next one:
Quote: The only way to protect air- cooled two-cycle engines against piston ring sticking at their high peak temperatures is to include some detergent additives in the oil formulation. Detergents provide high temperature deposit control not available from other additives used in the oil. However, in the air-cooled engine, any ash deposits that could form from the detergents are dislodged by engine vibration and exhausted from the engine. Carbon residue is formed from unburned and partially burned fuel, and from burning of the crankcase lubricant. Water from condensation of combustion products along with carbon residue from fuel contribute to engine piston deposits. Carbon de posits are normally black and have a sooty appearance. Air-cooled oils contain lower amounts of antioxidants and dispersants, since the detergent additives do most of the work of preventing deposit accumulation. These oils also contain rust inhibitor additives to protect against rust that can form from water that enters the engine due to condensation.