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127 Posts
The last few months I have noticed a consistant three to four miles per gallon loss in overall mileage at every fill up. I am used to getting 49 - 51 mpg around town, and now all of a sudden it is down to 45 - 47, even when I am really watching the throttle hand. About the only thing I have done any different is on the last oil change I tried Mobil 1 10w 40 high mileage oil in the engine and tranny. Final drive has Mobile 1 synthetic final drive and that has been used for a couple of years. Sparks have about 8,000 since the last changing. The bike seems to be running just fine. No rough idle, hesitation, or poor acceleration. Just a rather puzzling drop in gas mileage. Running OEM Bridgestones with about 8,000 miles on them. Plenty of good tread left on both. :?: