Ok, here it goes...this car has been in my family since it had 7 miles on it. My father put 109,000 miles on it. All the service has been done (amsoil used at all oil change's)..fuel lines replaced at 90k and the evap core redone about 19k ago. Here are some of my questions.

1. when shuting car off the car shakes (not a smooth shut off) is it normal?
2. the car shifts hard when acceling hard (more than a normal hard upshift) that is comparied to a gas car.
3. it seems like when it is cold even after the glow plug light has gone off the car will start rough and even die out if you don't let it warm up a looong time.
4 I live in cleveland ohio....what weight oil should I use....in a syn

Thank's in advance for all your help....I hope that none of these questions are to stupid...I will post pics of car later....I am in love with the gas mileage....Oh and i love the heated seat's with lumbar.....