EM2Civic

I changed my oil 2 weeks ago, and I overfill it a little bit and I was too lazy to drain the oil out again. It is 2-3mm higher that MAX on the dip stick. The car runs fine for 2 weeks and I put about 1000 miles on it already.

The odd thing I notice is that my car actually get better mpg, I get about 37 mpg out of my 5 speed EX with 68000miles, which is 3mpg more than b4 when not overfilled. I drive the car pretty fast, rev to 6800rpm pretty often and bring it up to 100m/h for many times.
And it actaully run a little smoother too.

It is just amazing how that D17 perform, I mean it doesn't have much power, but with 68000 miles, it still run pretty much like it was new. Only engine mod is K&N drop in filter. and get 390miles b4 the light is on.

Can anyone explain this??Or it is something else not related to overfilled oil.

jahernandez

I have heard of people adding half to a full extra quart of oil when they autocross to help with the, for lack of technical terms, "sloshing around" of oil. It helps when racing I guess, but I would be wary of putting any extra in your car for everyday driving. In the long run, this may cause oil leaks due to extra pressure on your seals.

Sickboy

iTrader: (3)

+3mpg could be caused by a hundred different things. A few mm's on the dipstick could be caused by an unlevel car, checking the oil when it's not at operating temp, etc. I wouldn't lose any sleep.

zen_master

iTrader: (6)

wtf ****, how in the hell this could ever happened??