i changed my oil last week. this time i upgraded to mobil 1 drive clean 10w-30 and a bosch filter. i noticed a differnce in driving in that my engine is alot smoother. i drove the car today and it shifted very smooth and it was accelerating alot faster. yet i feel that there is a loss in power somewhere. if i step on teh gas of course ill take off but not like before. before i had power...now its just torque. its hard to explain. maybe before i just had a less powerfull engine and it had to work really hard to get up to a high speed, vs now its not working as hard and pulling better and harder. you guys kinda get where i am going? o and i also noticed that in the mornings my car is a little harder to start up than before. before when i had castrol gtx 10w-40 with a fram filter it started up kinda quick about 1-2 sec but now wiht the bosch it takes a while (seconds wise) i say 2 to 3 seconds. what can be causing this?? is it just me?? is my car just better now than it was before and i am not used to it? thanks!