My truck is a '98 with the 5.7. Being as I have one of those faulty fuel sending units, I keep a can of fuel around "just in case". To make a long story short I went and filled it up only to be told that my son had pre-mixed some gas for his motorcycle and there was about a gallon left. I put about 5 gallons on top of this which should have diluted it pretty well. Should I still use it in my truck? Thanks.

It will be ok to drive.

Thanks for the reply. I know back in the day if it burned it went in the tank. But with todays engines I didn't want to take a chance.

it will just smoke a bit.