Birthday is coming...

if you are taking back roads I'd highly recommend rear anti-sway bar. It might have marginally improved MPG (you can carry higher speeds through turns) but the truth is it so much more fun to drive!

On a side note the biggest MPG jump you'd see if you get Michelin Energy Savers, but it makes sense to wait until your tires are worn out good luck

 

Alot off Prius owners choose either Husky or Weathertech floor liners. They are molded to fit your car and feature higher side walls which trap dirt and water well. If you live in a very snowy region then I would look into the Husky mat. Judgeless on this forum has had bad leakage issues with the Weathertech liners. I have had no issues and love my weathertech liners but I don't deal with much snow. The husky liners appear to have taller side walls which should hold more water thanks the other liners and mats. Liners or mats can be ordered from the Priuschat Shop.

 

The ScangaugeII velcro adhesive will not stick to the Prius III dash. My solution was to adhere one of the ScangaugeII velcro adhesive to a large (3 inch) black metal paper binder clip (the type you get from the office supply stores ) which I then clip it on the top HSI dashboard display overhead ledge (with the velcro on the top side). I then remove the two metal tongs from the paper binder clip. I put the other velcro on the bottom of the scangauge II and place the ScangaugeII on top of the black metal paper binder clip via the velcro so that the ScangaugeII sits over the HSI display. I run the ScangaugeII cable down the right side of the transmission/bridge-hump then underneath the dash to the ODBII port underneath steering column.

I've programmed my SGII to display AVG, GPH, SOC while I alternate one display to either display Fwt or MPG. The Fwt is used to determine if the engine is getting too cold ( this is more important in stop and go urban winter driving environments) in non highway winter driving its important to keep the FwT above 140 degrees after the car has initially warmed up so that the ICE does not automatically turn on. The SoC is used to determine if the battery level is too low - if Soc falls below 50 - I use the ICE more often and try to recharge the battery levels back up to prevent the engine from automatically turning on to recharge the battery. The most important gauge highway driving is the GPH, which shows the burn rate of the ICE. At speeds > 55 mph, you'll want to try to keep the GPH under 1.5 most of the time. At speeds greater than 50 mph, there are two hypermiling techniques you need to master to get the highest MPG from a Prius is DWL and NICE --- The Prius gets better fuel efficiency when applying power going downhill than when applying power going uphill.

If you have the money get low rolling resistant tires for your Prius - if you can't then inflate your tires to 40psi front and 38 psi rear. - this will lower your tire's rolling resistance but should not alter your super highway road handling. Get a profession tire pressure gauge. A good bicycle tire pump could be useful too. Increasing your tire pressure above the maximum sidewall pressure (44psi for a Yokohama Avid s33) will alter the tires performance and handling at highway speed. If you are driving on rough roads or grooved road surfaces the benefits of tire overinflation ( lower rolling resistance created by a more rigid tire) diminishes greatly and reseting the tire pressure back down to the car's spec 35psi/33psi for a more spongier ride may produce better FE as well as a better ride.

To get the best fuel efficiency, keep your highway speed between 50 mph to 65 mph and the windows rolled up ( turning on the AC at highway speeds is preferred over having the windows open at hiway speeds).

Prius has very lo ground clearance -beware of uneven street
curbs and driveway which can scrape the underside of the front
lower air dams/fenders.

The interior plastic scuffs easily so apply a vinyl protectorant on it

The cloth armrest and rear cargo rug can easily stain so apply scotchgard/fabric protectorant on it. get something to coverup that rear cargo rug if you use the cargo area frequently.

Apply RainX and FogX to your windshield every year.

wash and wax the exterior ... Prius exterior paint is soft and prone to scratches and scuffing - make sure you are not wearing anything sharp, hard or metal;ic ( zippers , jewelry, etc) when you clean/wash/was your car. Because the Prius roofline is high - you might need a car wash mop to reach the roof if you wash your own car.

The Prius has a great deal of window surface - in hotter sunnier climates many Prii owners opt to tint the windows and/or have windshield sun shades.

Other car gadgets
a 12 VDC 110VAC inverter in the armrest.
a Garmin Nuvi GPS unit
a bluetooth cell phone (which I hook up to the car when driving)

 

^^ I wanna see pics of ur scangauge!!

 

I'll second the OEM Canadian AW mats. Have worked excellent for rain, snow, ice, mud and mechanic boots.