Originally Posted by cals400ex
After changing the oil/filter, I had a noticeable hesitation and lack of acceleration when accelerating for the first 1/2 mile that I drove the car.
The hesitation only lasted about a 1/2 of a mile, and I have not noticed anything out of the ordinary since.
So this happened one time and never again? Maybe it took a little bit for the entire oiling system to 'settle in' with a little running time after the oil change.
Even though it was 90F outside, the engine is still 'cold', and if you are trying to accelerate with a cold engine it could be the variable valve timing isn't operating 100% because some cars use engine temperature as part of the control inputs of the system.
Originally Posted by cals400ex
However, why did this happen right after the oil/filter change? Maybe it took a little time for the oil to penetrate/flow well through the more restrictive, small xg6607 filter, causing the lack of acceleration?
Your car has a positive displacement oil pump, which forces oil through the filter and engine. Really no way for a new oil filter to be so restrictive that it's reducing oil flow at RPM that is well below the red line realm. Engine oiling systems are not like the water system in your house where a restricted filter might reduce flow.