What oil is best? and what ratio?

[Moparmyway]

If I had more options open to me, I would run a lower octane fuel.
My choices in non-oxygenated are either 118 low lead or VP SEF
I dont like the spooge that the low lead was leaving on all my mufflers in every application ........... so its narrowed down to VP 94 SEF

 

[Ron660]

94 octane was around 3.5% faster than 87.

Any Michelob in that ice chest?

 

[Ron660]

It is both
I mix 800 off road and R50 together (50/50) running 5oz per gallon
I really am not sure how much time was on it or how many gallons anymore.
I did know, but I have forgotten since then.
I run a few 90cc saws at the same time, but IIRC, thats well over 5 gallons, probably closer to 10 gallons with that mix in that saw

I did a little work to the cylinder while it was apart ............. she gained some

You prefer a 25:1 mix (5 oz) besides 32:1 (4 oz)? Also, are you getting better protection by mixing R50 and 800 besides using only 800?

 

[junkman]

Does the oil raise or lower the octane of the fuel ?

 

[Keith Gandy]

Does the oil raise or lower the octane of the fuel ?

Imo yes

 

[Moparmyway]

I like the way R50 looks inside the motor at teardown, I havent seen anything look better.
I cant stand the smell of R50 after 5 minutes, having the operator gagging for air is no way to run a saw.

I had alot of R50 and alot of 800 off road, I like them both, so I mixxed them up and tried it on a mini-mac.
Ran great for 3 tanks, pulled it apart and decided to run everything with it
Them 661 pictures I put up tell the story, just look closely........... best of both oils

The 25:1 is bacause my big guys get used for stumping
I have burned the hair off my hands, fingers, and wrists stumping ............ gotta make sure the bearings on these wide bodied 90cc saws get enough drink, they certainly work in a hot enviornment.

 

[Moparmyway]

Does the oil raise or lower the octane of the fuel ?

It lowers it

 

[Keith Gandy]

So in theory 87 with a more readily combustible oil should produce the most power

 

[Moparmyway]

So in theory 87 with a more readily combustible oil should produce the most power

And in most instances that has proven to be correct

 

[mdavlee]

Oils like HP2 that will burn up in a saw cutting cookies and not only when milling makes a lot of power. The only thing I can figure on the HP2 and the klotz combined with using the Vp and 87 is a cumulative effect. The last board cut with Klotz was the middle of the log and the first with HP2 was right after. The HP2 took 2 minutes longer to cut it with the VP fuel than the 87 and klotz. That's a huge difference in something. The wood wasn't frozen the 2nd day and the chain was touched up before I cut the first slab with HP2. I had to touch up after 2 more slabs and made it through the last 3 on that touch up. It was feeding itself on the 2nd cut with me just holding the trigger and putting a hand on the mill to take some vibration out.

 

[jmssaws]

I like the way R50 looks inside the motor at teardown, I havent seen anything look better.
I cant stand the smell of R50 after 5 minutes, having the operator gagging for air is no way to run a saw.

I had alot of R50 and alot of 800 off road, I like them both, so I mixxed them up and tried it on a mini-mac.
Ran great for 3 tanks, pulled it apart and decided to run everything with it
Them 661 pictures I put up tell the story, just look closely........... best of both oils

The 25:1 is bacause my big guys get used for stumping
I have burned the hair off my hands, fingers, and wrists stumping ............ gotta make sure the bearings on these wide bodied 90cc saws get enough drink, they certainly work in a hot enviornment.

I've run lots of r50 also and like it, I also like klotz benoil in the green bottle.

Nothing I've used had things as oily as klotz and that's why it run it, I haven't seized one of it and believe me I've tried.

 

[KenJax Tree]

Oils like HP2 that will burn up in a saw cutting cookies and not only when milling makes a lot of power. The only thing I can figure on the HP2 and the klotz combined with using the Vp and 87 is a cumulative effect. The last board cut with Klotz was the middle of the log and the first with HP2 was right after. The HP2 took 2 minutes longer to cut it with the VP fuel than the 87 and klotz. That's a huge difference in something. The wood wasn't frozen the 2nd day and the chain was touched up before I cut the first slab with HP2. I had to touch up after 2 more slabs and made it through the last 3 on that touch up. It was feeding itself on the 2nd cut with me just holding the trigger and putting a hand on the mill to take some vibration out.

So was it the oil or the higher octane fuel slowing it down?

 

[jake wells]

why dont some of you guys try 16:1 running sae 40 non detergent and see what kind of oil film you got.

 

[KenJax Tree]

I've run lots of r50 also and like it, I also like klotz benoil in the green bottle.

Nothing I've used had things as oily as klotz and that's why it run it, I haven't seized one of it and believe me I've tried.

FWIW i haven't seized anything in 20 years of tree work using everything from no brand gas station dyno oil to high end castor oil.

 

[Ron660]

I like the way R50 looks inside the motor at teardown, I havent seen anything look better.
I cant stand the smell of R50 after 5 minutes, having the operator gagging for air is no way to run a saw.

I had alot of R50 and alot of 800 off road, I like them both, so I mixxed them up and tried it on a mini-mac.
Ran great for 3 tanks, pulled it apart and decided to run everything with it
Them 661 pictures I put up tell the story, just look closely........... best of both oils

The 25:1 is bacause my big guys get used for stumping
I have burned the hair off my hands, fingers, and wrists stumping ............ gotta make sure the bearings on these wide bodied 90cc saws get enough drink, they certainly work in a hot enviornment.

When I'm cutting stumps with my 660 it seems like it doesn't oil well with my 28" bar. Keith's worked on my oiler, with the help of Mike, but it still doesn't oil well laying sideways cutting stumps. The bar gets so hot it takes off the paint.

 

[junkman]

why dont some of you guys try 16:1 running sae 40 non detergent and see what kind of oil film you got.

 

[mdavlee]

So was it the oil or the higher octane fuel slowing it down?

That's about 50% slower though. Never noticed that much difference before. Im going to try the HP2 in pump gas. Might only get to try it in the oak log cutting cookies but I'm going to compare somehow. I've not noticed more than 10% difference in fuel and that was with 110 and 93.

 

[Moparmyway]

When I'm cutting stumps with my 660 it seems like it doesn't oil well with my 28" bar. Keith's worked on my oiler, with the help of Mike, but it still doesn't oil well laying sideways cutting stumps. The bar gets so hot it takes off the paint.

I have the pin in on my 661 and its cranked all the wayup ...........
I have an 066r with the oiler all the way up, its the wettest of the 3
I have an 066 with the oiler modified

The two 066's have new oil lines and weighted pickups

I have no problem with 36" and .404 on any of the 3 90 cc saws

The biggest helper for keeping cool is to use wedges to keep the stump off the chain

 

[Keith Gandy]

High octane = slower combusting and unable to burn the whole mix intoduced completely in a short 2 stroke
High index/film oil= less combustible and slower combusting
tuned rich= worsens the effect of both which is leaving alota unburned oil and fuel that washes the piston clean. Go opposite on every account and u have faster igniting fuel and oil with more efficient complete burn resulting in more energy and a byproduct left behind thats visible

 

[mdavlee]

High octane = slower combusting and unable to burn the wholr mix intoduced completely
High index/film oil= less combustible and slower combusting
tuned rich= worsens the effect of both leaving alota unburned oil and fuel that washes the piston clean. Go opposite on every account and u have faster igniting fuel and oil with more efficient complete burn resulting in more energy and a byproduct left behind thats visible

I think that's why redbull got the fastest times with Hp2.