What is a good engine speed range for highway driving?

My car only has four gears, cruises nicely from 80-100 kpm before reaching over 2000rpm. I'd like to know what is the upper most engine speed (rpm) that my motor should stay under while driving whilst keeping the engine healthy not overworking. I have a 3.0 v6 Honda VTEC motor.

How many amps can I draw from an add on fuse circuit connected to the fuse box?

I want to install an invertor on my 1996 Honda using a fuse add in circuit like this on:

http://m.aliexpress.com/item-desc/702894978.html

I do not want to install a relay off the battery so is this a safe option to draw 20amps? Though the fuse box.

I only want to know if its safe to draw that much current though this method. I know all about the alternators limitions etc.

In need of buying a new car?

My 2003 Pontiac Sunfire has died on me and I'm in need of a new car. I'm not very knowledgeable regarding cars so I'm just wondering what type of car I should be looking for. I'm not looking for anything nice, just a poor college student that needs a car to get me from place to place.

I also have a 35-40 mile commute to work that is mostly highway so something that has good MPG HWY is a must.

I have a budget of $4000 max, I know I'm most likely not going to get anything awesome and will probably be replacing it within 2 years or so but that's all i need. I'm currently looking at some Toyota Camrys and some Honda's, are there any other types of cars that I should be looking into?

A nice pickup truck of suv for 2000$ or less?

I need a used truck or suv that tows at least 4500 lbs and my price limit is 3000$ I'd like to only spend 2000$ though. Also I don't want someone to come in and only recommend one brand saying it's better. I want to know the best for the price limit I have any brand except Honda.

1989 honda crx trans problems?

Well. For the past several weeks my tranny in my crx has not shifted into third very smoothly. As I was driving, all of a sudden it felt like I got hit by a car and the car stopped. Well, started it up then I hear a horrible grinding/clunking noise in while in nuetral. I tried putting in gear (still clunking) will go in but won't move. Also when I shut the car off and put it into gear without it rolling, it still rolls and the gear doesn't catch. I had it towed home let it sit for awhile, started it up, noe it didn't seem to sound bad at all. I heard the humming still but not nearly loud as it was while in neutral, plus it drove fo ward and reverse! Can any explain wtf is wrong with my tranny?