How did they determine it was bad fuel?

Thanks,
Jeff

We have been using 10% fuel here in Michigan for several years now. I run my tanks down to 1/4 or less in the fall. In spring I fill up with good high octane fuel. So far no problems.

Not trying to hijack... but on this subject...

if I put her away with half of a 120 gallon tank of 89.

Should I stick 20 gallons of 93 in there to bring the average up?

Sorry about your engine Jeff.

Depends on what min octane you need it to be and how long its been stored.

been stored since September.

Min octane is 89

Your octane is probably down to about 85. You will need mix a 120 gallons of 93 with it to get it back up to 89.

Its all math

120gal x 85= 10200
120gal x 93= 11160

10200 + 11160= 21360

21360/240gal = 89

What would you guys recomend to do with the gas? I have a 60 gallon tank with about 40 gallons of 5 month old E10 fuel. I have an electric fuel pump and I am sure I have cycled all of fuel through the separator. If I empty my filter and check for water can I use octain boost and 20 gallons of fresh fuel to get it back up to speed. Again I do not even know if the fuel is bad. But everyone seems to think E10 is only good for 30 to 60 day. If I need to ditch the fuel what do I do with it?
Thanks,
Jeff

I filled my truck, my car, my neighbors car etc Rest went into a 1000gal holding tank for excavators and work trucks that a friend had. Fuel is fine for running in cars, lawn equipment, so forth. Just don't want to take a chance with $$$$$ motors.

Use the electric pump and move it to red jugs (6gal) if you have them. Man ... with 40 gals and a Holley Blue (110gph) you should be done in < 20mins. and not that much fuel to be bothered with. Mine took a while longer and more $$$ to replace. It may not have caused the problem, but its best to just eliminate the possibility entirely and be done with it!

Next year I'm leaving my tanks dry!!!

I called a friend that works at a local fuel supplier. He recomended to do the same thing and blend the old fuel with the new. I don't know if fuel is the problem but I am not taking any chances. The truck and car only need 87 so if a mix the 5 gallons of old fuel with 15 gallons of 93 it sounds like that may work. I will tell everyone I know for now on store your tanks empty and fill up in the spring.

Thanks for the equation.

Using it with the actual numbers...

1/2 tank= 60 gallons of "85" = 5100
60 gallons of 93= 5580

10680/120 gallons = 89

Whoo hoo!