Mixing fuel?

[tonitrus]

I run my VN wagon on normal unleaded at the moment and was thinking about trying premium to see if it runs any better/better fuel economy. If I have anout 1/4 of a tank left which is normal unleaded, is it alright to put premium in with it or should I run the tank down a bit more before I do?

[VN_Luke]

your car isn't going to explode if you do.

[sircruisealotVS]

its cool to mix premo with unleaded...the octane rating of the premo will be diluted by the unleaded though...
so you probably wont notice much difference in economy and power till the second, maybe even third tank full of premo.