Try three or four tankfuls of REGULAR unleaded, providing that it does not ping or spark knock. The lower octane fuel burns more completely. Also, make sure your air filter element is clean or just replace it.

__________________
Jeff Lawrence
1989 300e
2000 Dodge Grand Caravan SE
No matter what you fix, there will always be something else to fix..
"Warranty" is just another way of postponing the inevitable.