Not being able to compare the car to others with a similar motor, I wanted to ask drivers of the Alloytec 190 V6 if you too (in power mode) experience on the occassion some pretty rough gear changes? By that i mean you feel the whole car jolt when it changes gears. Although the car is still 15000kms away from a major service I was also wondering whether it was worth getting spark plugs and transmission oil change done at a genuine holden and just pay what they want. The car seems to be using a lot of fuel too. I fear getting an apprentice at my usual mechanic place (kmart) and them messing up something especially with the transmission which would cost me big in the future. Any thoughts? thanks!