Its a 2018 FXT, with 20,000 kms done. Post 2nd oil change (Full Synthetic 5w-30) & tire rotation, I'm experiencing sluggish performance, especially after reaching 80KMPH, i've to accelerate hard, the speed slowly climbs up to 100kmph. Also, i notice a lag in the power delivery and I get a feel of pressure leak. Has anyone come across this issue? Any help, really appreciate it?