Disclaimer: The following may contain biased drivel. See avatar for details.
When I was dailying my dads na mx5 I gave my friend a ride to school, and he was very confused with what I was doing with my legs and the shifter, because he had no idea what a manual car even was!
I agree with this. When I was a kid I thought everyone except my parents was a bad driver since my parents were the only people with manuals.
Before putting the gearbox in Drive (D), you have to step on the brakes first; otherwise the car would just set off on itself. And you have to let off the brakes slowly if you want a smooth take-off.
Thanks for the driving lesson
Correct me if I'm wrong, but doesn't the torque converter in an AT use fuel? If so, that would explain the horrible fuel consumption my sister experiences, because her workplace isn't really that far from where we live, and yet at times, she experiences frequent trips to the gas station.
The torque converter can be a source of energy losses, but in a modern car the automatic gearbox is usually more efficient than a manual, for a couple of reasons. Locking torque converters mean than no more energy is wasted than when using a clutch, and modern autos now often have more ratios than a manual. Additionally, these ratios are usually taller for better economy than an enthusiast focused manual.
To answer your economy question, there are two factors that could be causing such poor economy. The first, and less likely factor, is the fact that the trips she takes are short. If the engine isn't being warmed up completely on her commute, it's likely that the engine is not running as efficiently as it would normally be. However, that's unlikely given that you live in a consistently warm climate. The issue is most likely your sister's driving. Driving habits make a much, much bigger difference to economy than the car will. In particular, if you find that she drives aggressively, uses the brakes frequently, and tends to drive quickly, then her poor fuel consumption is almost certainly her own fault.
Have any of you guys experienced driving with both transmissions? What are your experiences and thoughts?
I had the relatively unique experience of learning to drive on both an auto and a manual (two of each, actually). It was an interesting and fairly educational experience, and I consider myself fairly lucky to have reasonably extensive driving experience (as much as a car crazy 19 year old can) in both automatic and manual cars, which is fairly unusual for people of my age both in America and in the UK.
One thing that really bothers me is when people complain about manuals and hills. It takes a little practice, sure, but hill starts are not hard. I grew up in and learnt to drive in Pittsburgh, where going anywhere meant doing several hill starts per journey. I've always found automatics slightly scary on hills, since they roll back and there's no real way to reverse this. A manual car, driven properly, will not roll back at all. This is one of the reasons I thought, as a child, that everyone other than my parents was a bad driver. It was so unnerving being on a hill; I always used to get scared we'd hit the car behind us.
Additionally, I absolutely hate the fact that automatics offer no engine braking. Again, this comes down to the fact that I grew up and learnt to drive in a very hilly city, which means that driving an automatic requires extensive use of the brake. In a manual, you just pick a ratio and let the engine keep you from careening down the road.
Anyway, the auto vs. manual debate has been done a million times before, and in the end almost all of it comes down to personal preference. Automatics are objectively better, but manuals generally offer a more involved driving experience and more control over the car.