I know this request may sound a little odd, but I need to make E50.
I'm not very versed on the calculations so any help would be appreciated.
Our stations only provide a best of 90oct mixed w/E10 at the pump...If I'm able to get 5 gallons E98, how much pump would I need to add to effectively make E50?

 

It is getting late here but read this thread and if you still have questions I will try to get back in here the next day or so to see if you still need help- the formula is based on the old "Pierson Square" that feed consultants used to use:

http://marksullense85.proboards.com/...lay&thread=202

 

Thank you very much sir, that sure did help...just to make sure that I did the math right though, my result says that I'll need 6 gallons of my E10 pump gas...correct?

 

Correct- add 6 gallons of E10 to 5 gallons of E98 for a final 50% ethanol content.