Hi Matt, I am not really saying that the replacement interval is a year; it's just that I don't know how long it was before then that the components were installed. Once I replace them, then I will know for sure how old they are. A bad O2 sensor, that can make for a 2-3 MPG drop on its own. But as Ben said, the seasonal variation in the petrochemical blend they sell as "gasoline" could also account for a 5% hit on its own. Happy Trails, Greg Potts 1973/74/79 Westfakia "Bob the Tomato" 1987 Wolfsburg Weekender Hardtop www.busesofthecorn.com www.pottsfamily.ca Matthew Snook wrote: > How often should we go through all that stuff? My mileage was right around > 20 as long as I drove conservatively. Now my best is 18.5 average, probably > for the last 2000 miles. Last tuneup was a year ago, I don't know if Mike > put in an O2 sensor at that time. > > Matt > > > -----Original Message----- > From: Greg Potts > Subject: Re: Reduced Mileage > > ... I know my fuel economy is down since the summer time but I figure I also > have other contributing factors to blame as I haven't replaced any of the > ignition components or the O2 sensor since I got the van last April... > |
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