Author Topic: Oil ratio on a 2000 288xp, a 90 262xp and a 550 xp  (Read 561 times)

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Offline adam32

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Rupley showed me a test he saw one day that said 32:1 was the best for power and lubrication. I usually run 32:1 with 100LL and either Stihl Syn or Lucas Semi-Syn.

Offline HolmenTree

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I think most failures  can be related to poor fuel quality  with ethanol. Too be honest I run 40:1 with Stihl full syn Ultra in all my work saws.
32:1 Yamalube R in my bikesaw.
Making a living with a saw since age 16.

Offline Bluegill

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I like 91 octane mo better than 100 & my saws are higher comp ported rigs. 91 with 40:1 is fine in all your saws.

Offline Cut4fun .

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Ive never seen bottom end failures on work saws, but Cliff mentioned he used to have crank bearing failures on the saws run at 50 to 1 in the woods.  Didn't Bell do a test on mix ratios from 16 to 40-1 and found the richer mix made more hp? 


I remember they had failures in short time in the cranks and or bearings in those solo 681's they got. 
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Offline Cycledude

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Husqvarna recomends 50-1 and that's all I've ever used, I bought the expensive premixed stuff to extend the warranty but really never noticed anything different when using it compared to the 91 octane I normally use.

Online jmester

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I think as long as you are in the 90s for octane rating you should be fine. My old boss would run 87 in his saws and they just ran a little rough. I agree on the 40:1 ratio as mentioned above.
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Offline mdavlee .

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I like 87 e free. It's always the freshest. I've ran it in saws with 235 lbs of compression with no problems. 93 is always stale it seems from the pump. I just dumped a half gallon of the last 2 gallons of it. It was 6 weeks old at the most.

Online jmester

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No e free gas in my neck of the woods. I am not buying vp fuel for like 18.00 a gallon. You may have a point on the 87 being fresh. Have enough Harley's and sport cars around now it's warm again to get the 93 moving.
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Offline mdavlee .

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I bought 5 gallons of vp fuel for $70 delivered. I wanted some for storage fuel. I'll just keep buying 87 and if I remember put octane booster in it.

Offline Bluegill

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87 is fine in chainsaws, no need at all to add octane booster.

 

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