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Nope. Didn't happen to me, and I've never heard that. Maybe you were driving a bit differently, or in slightly different conditions? Could anything else have changed? If anything, it's counterintuitive that the mileage would drop after an oil change.
Actually, I also noticed a slight drop for the first tank following the oil change. And I did the change myself so I know it was done right.
Like you, after a few hundred miles it was back to normal. Several tanks since and I now have an improvement in mileage. But that's because I'm still learning how to drive this dang thing. It's more fickle than my wife.
I just had my oil changed. Cost was $45+ tax. (They wanted $40 for Tire Rotation, but I passed on this).
I was working on 47mpg tank, but at oil change, my trip meter was reset (by product of clearing service wrench?).
The second half of the tank after oil change, I averaged 41mpg over ~200miles. The drop in mileage doesn't compute with me - Maybe breaking in new oil causes mileage drop...
Anyway, I am on a new tank and am back to 46mpg. Maybe it was just an anomoly.
Did anyone else experience something like this?
I also had a large reduction in mileage after my first oil change, but it has not returned. I watched the dealer do the oil change, and used the correct Honda 0-20 oil. They did not do anything else except rotate the tires from front to back. I was averaging about 49 mpg (looking for 50+), and now I am limping along at 46 for the last 2 tanks, worse than even the very first tank. I can't see that my driving has changed at all. I have made some changes including changing the AC levels from 73 to 75, and no AC in the morning commute. Tire pressure remains around 38.
I did read in the manual that the AC will make a dramatic difference in mileage, but have been running the AC all along here in Texas since March, when summer arrives. Guess window tinting comes next.