Way to improve gas mileage

When I got my 2004 Impala LS it got 19.5 miles city and 26 highway. This was using regular oil 5W30 as called for in the manual. I switch to Full Synthetic Oil 5W30 and got a large increase in mileage. Current mileage using Full Synthetic is 25 city and 33 highway. I will never go back to natural oil again, it is more expensive to use synthetic however the savings in better gas mileage more than makes up the diffference.

Vote on this story This is good This is bad Report spam Add a story about your Chevrolet Impala Reply to this story Name: Message: Reply