I WAS JUST WANDERING WHAT OCTANE GAS IS THE BEST TO RUN IN A 400EX.



01' 400EX, YELLOW, EVERYTHING STOCK, BUT NOT FOR LONG

 

My mechanic told me to run 87 octane, NOT the 92+ the manual recommends. He said there is so much alcohol in the gas (re-formulated crap they make us use here in WI) that it will cause it to run too lean.

'00 400ex

 

My 400EX can't tell the difference between 92 and 87 octane, so I just use the 87 octane.

 

you already have a yellow 400ex?

 

YES, AND NO. I WENT LAST WEEKEND, AND RESERVED ONE. THE DEALER SAID I SHOULD GET IT BY THE END OF JUNE, HOPEFULLY. CAN'T WAIT!!!!!!!!

 

I run 94 in my 300ex and i can tell a big dif.

 

I know my 400 ex runs better on Sunoco's 94 than it does on BP or Citgo 93.

 

If you guys want a alcohol content tester just E Mail me and i will give you the Briggs and stratton part number as they sell one for $5 at any small engine saw shope I found that only Chevron super if free of alcohol and MTBE in Oregon and WA all the others are loaded with the gasohol. Joe

 

Well I there isn't a chevron station within 50 miles of here so i'll have to take what they have.
BP,Citgo and Sunoco are still better than Duke's 10 percent alcohol gas.

 

high octane won't hurt it and it's not that much more on a 2.6 gallon tank