Neighbors gas 8 octane over recommended?

robertz6April 12, 2012

I was walking by today when a neighbor was trying to get his Craftman walk behind mower started. He said the plug was new and he was running it without a filter (which I never did).

But the point I had a question about was the octane, I imagine the manual says 87 octane for the Sears, he said he went to premium (I guess 93 octane). If higher octane runs the engine hotter, is this enough to shorten engine life?

Thank you for reporting this comment. Undo
robertz6

Whoops, I can't subtract. That would a difference of 6 not 8 octane.

    Bookmark   April 12, 2012 at 2:59PM
Thank you for reporting this comment. Undo
don_1_2006

No he is just wasting his money.

    Bookmark   April 12, 2012 at 4:03PM
Thank you for reporting this comment. Undo
edsacre

Actually the higher octane will run cooler. More likely to cause carbon buildup. A waste of money.

    Bookmark   April 12, 2012 at 11:03PM
Thank you for reporting this comment. Undo
dodgeman

When I bought my (Stihl) chainsaw a few years ago, the tech told me to use premium because it contains less ethanol than 87/regular.

I haven't had time to confirm if that statement is true.
That said, the saw and everything else I run on super, works great.

Other than that, unless you're running a high compression engine, the extra octane is a complete waste of money.

    Bookmark   April 13, 2012 at 5:17PM
Thank you for reporting this comment. Undo
rcmoser

An't gong to matter! running the engine with the air filter removed will alow all the dust, grass clippings, to be sucked down the carb. If that don't plug the carb. up it will soon wear the piston to cylinder wall clearance, turn the oil to gritty past and it will start smoking, knocking, and eventually won't start. If he really wants to save money and heartaches down the road spend the extra money he is wasting on high octane gas on a new air filter. That would be the best bang for his buck if it an't too late???????????????????????????????????????????????????????????????

    Bookmark   April 16, 2012 at 7:08PM
Sign Up to comment
More Discussions
Have you successful cut any “seasoned firewood” inside?
Have you successful cut any “seasoned firewood”...
loger_gw
Older Troy Built Tiller Model ID
Trying to indentify model number of my unit. It is...
gardenerfrank
Toro 826 Drive Belt Jumps Off Crankshaft Pulley
Hello, I have a nine year old Toro Powermax 826. Late...
ronpr2112
Sears air compressor engine won't run when plugged in
Sears Paint Sprayer/Air Compressor Model No. 106.153542...
Cletus77
Troy Bilt Horse Drive Shaft Bearings
I took my horse apart because the front transmission...
gildomilo
© 2015 Houzz Inc. Houzz® The new way to design your home™