Fuel additive hurting performance

[363Maverick]

Has anyone experienced a fuel additive hurting their performance at the track.  This past weekend I added 1 ounce of Lucas Safeguard Ethanol conditioner and stabilizer to 5 gallons of E85 and the car slowed 2 tenths in the 1/8. That was the only change that was made from the last run.  I could feel the loss in power during the run,  Also, I always check the ethanol content for 85% for consistency.  Any thoughts?

Thanks,

Eric

[bigydaddy]

was the temp right? Might be cool still