One more fuel question

[Rludington]

What would you rather use,
87 octain top shelf ethylene free or
91 octain ethylene free ?
I dont know if the top shelf makes any difference in these small engines. No one seems to talk about that.

 

[ILENGINE]

I won't run anything on less than 91 octane. With or without ethanol, and don't care if top tier or not.

 

[Lawn Ranger Don]

I've been using regular on everything for 50 years.

 

[slomo]

Most mowers are 8-8.5:1 compression. 87 octane E-0 is fine.

Now if you want to talk chainsaws, 91 E-0 is your friend. Some blowers might be over 10:1 so check your manual for clarification.