71:1 Ratio Fuel Mix

[Trigger-Time]

71:1 Ratio, thats the Ratio for this pre mix.
Anyone here tried it?

 

[PES+]

Optigon oil

 

[maveric944]

at their ratios it actually works out at 75.6 to one at 3.78 litres

 

[Trigger-Time]

at their ratios it actually works out at 75.6 to one at 3.78 litres

Here it works out to 71.11111111111111 to 1 :hmm3grin2orange:

 

[Trigger-Time]

Optigon oil

Optigon..........?

 

[troutfisher]

I'll stay with 40:1. I don't like the sound of that stuff.

 

[rahtreelimbs]

Anything above 50/1 I wouldn't touch with a ten ft. pole, and I don't run my saws at 50/1 only 32/1.

 

[Trigger-Time]

IMO......and just, IMO oil are soooo much better today and the Synthetic
oils are even better. I have hinted about running a saw at 60:1 or 70:1
to see how long it will last........again IMO, with the oil today I don't think
60:1 will hurt a thing with Synthetic.....am I going to gamble my $900
MS660 on 60:1......you can bet your a$$ I'm NOT! I just think the oils
will do better than they are telling us. IMO 50:1 is not the edge of the
mix, they have a safety margin, I would think.

Oregon, is saying that there oil will do a lot better than 50 to 1

 

[troutfisher]

IMO......and just, IMO oil are soooo much better today and the Synthetic
oils are even better. I have hinted about running a saw at 60:1 or 70:1
to see how long it will last........again IMO, with the oil today I don't think
60:1 will hurt a thing with Synthetic.....am I going to gamble my $900
MS660 on 60:1......you can bet your a$$ I'm NOT! I just think the oils
will do better than they are telling us. IMO 50:1 is not the edge of the
mix, they have a safety margin, I would think.

Oregon, is saying that there oil will do a lot better than 50 to 1

Ya know, If I could step back in time and tell someone running a saw in 1955 that I mix gas at 50:1, they'd laugh at me. It seems that over time we are mixing less and less oil. first 20:1, then 32:1, then 40 or 50:1, the trend continues.......

 

[Trigger-Time]

Ya know, If I could step back in time and tell someone running a saw in 1955 that I mix gas at 50:1, they'd laugh at me. It seems that over time we are mixing less and less oil. first 20:1, then 32:1, then 40 or 50:1, the trend continues.......

Very true.........I'm now going OT In 1989 I started changing
the oil in my pickup every 12,000 to 15,000 miles. Sold it to dad with
over 200,000 miles on it.....its just a farm truck now.....motor wise
I put one timing chain in it.....it still dose not smoke, will use 1/2 quart
of oil in 15,000 miles (Dino oil)........bought a new pickup in 2005, I'm
now using a blend, went 500 miles first oil change, now ever 15,000 miles
Oil is SOOOO much better IMO

 

[Fish]

Anything over 62.897/1 scares the **** out of me.

 

[Trigger-Time]

Anything over 62.897/1 scares the **** out of me.

:hmm3grin2orange:

 

[PES+]

Opti-2 branded Oregon

Optigon

good stuff if it is

 

[Trigger-Time]

I think another reason they are staying with the 50:1 on
the Synthetic, afraid people will mix dino oil to what ever ratio
the Synthetic oil called for.........but like the little Oregon 1 gallon
mix, dose not tell the ratio.......just mix pack with 1 gallon of gas.
I would say 95% of the people will not try to figure the ratio.
(and most don't know how)

 

[glenn31792]

I have a lot more 2 stroke motorcycle experience than I have of chain saw experience.
I have a different understanding than some of the posts here.
Some people speak of rich lean as the mix ratio of the oil and gas.
To me rich/ lean has to do with the jetting (air/fuel)
Going from 50:1 to 40:1 leans the motor out. Less gas more oil – they burn different.
More oil might provide extra lube but oil burns hotter ( may cause a problem).

My last big 2 stroke (bs 89x79) ran fine on amsoil synth at 88:1. I know the bottle said
100:1 but with that big of a piston I wanted a bit more oil to protect the cylinder from
Rocking forces. I spent some time to properly jet the carb in for this ratio.
Ring and piston looked fine at the end of the season but got changed anyway.

My motor with a 79 mm stroke , at 7500 rpm the piston speed in feet per min was 3887.
A 65cc chain saw turning 12000 rpm has a piston speed in feet per minute of about
3220 (assuming a stroke of 41 mm).

 

[bwalker]

The oil in question here isnt synthetic.

 

[Lakeside53]

71 Na.... 69 is my favorite number... I don't even know how a 71 works :monkey:


:jester:

 

[04ultra]

71 Na.... 69 is my favorite number... I don't even know how a 71 works :monkey:


:jester:

Well it goes like this..........................Never mind!!!




.

 

[Lakeside53]

Well it goes like this..........................Never mind!!!




.

If you can't use your words, draw me picture.

 

[Trigger-Time]

Well it goes like this..........................Never mind!!!




.

Looks like I may learn something else NEW!