Which Graco Cargo is narrowest?

[rogermexico]

For a three across problem I need a seat 16" or less. Data at this website:
Car Seat Measurements: CarSeatData.org - user ratings of carseats fitting into cars
suggests that the "new design" Graco Cargo is only 15". However on websites all I can find are the Graco Ultra Cargo Booster (in Wilbur) and the Graco Platinum Cargo Booster (in Sydney). Websites vary on how wide they report these seats to be. The Gracobaby site seems to list both the ultra and the platinum at 16.5", which leads me to wonder where the carseatdata people got their seat. It may just matter where the width measurement is made. Any ideas on what would work?
If not I'll just web-order the Platinum Cargo Booster Sydney from Target and hope for the best.

	Booster Seat A booster seat raises your child up so that the car's lap and shoulder belts fit correctly. The lap belt should fall across the upper thighs. The shoulder belt should go across the middle of the shoulder and chest. A booster seat is used for older children up to about 80 pounds. Some states have passed laws requiring booster seats for children up to age 8 or 80 pounds. Check your state's law.

	Graco - Click for more info Graco is one of the world's best known and most trusted juvenile products companies. They started the entire juvenile products industry with an invention called the Graco Swyngomatic. Since then they have invented products that have changed the way that parents travel with their children such as the travel system, which has made it so parents can lock an infant car seat into a stroller easily, without waking their sleeping baby. Their Graco SnugRide Infant Car Seat is pretty much synonymous with the term “infant car seat” because of its safety and design features coupled with its affordability. Today Graco continues designing and developing top-quality products that inspire parents and keeps children safe. Check out the new Infant Safe Seat Step 1 and Toddler Safe Seat Step 2 for proof of Graco’s continued commitment to child safety.

	Graco CarGo booster seat - Click for more info The Graco CarGo is a dependable and easy to use booster seat. When your child is on the lower end of the height/weight limits for the seat, the 5-point harness is used to keep them safely in place. It features a convenient one-pull snugging mechanism in the front of the seat - making it easy to tighten the straps down after your child has been buckled in. When your child is around 35-40" tall, the CarGo's harness can be removed, so that the seat can be used as a belt-positioning booster, using the vehicle's lap and shoulder belt. In this mode, the Graco CarGo will work for kids up to 54" or 100 lbs. Both the Platinum and the Ultra CarGo feature an Energy Absorbing Foam (EPS) liner, a removable, washable seat pad, and a cup holder. The Platinum CarGo is a softer and more comfortable seat than the Ultra CarGo (although still not as comfy as the well-padded Britax booster seats).

[rogermexico]

Ok I'll answer my own question. I bought two Graco Cargo Sydneys and installed them along with a standard booster seat (16" wide). The Graco cargos were 16" at the base but up to 16.5" at the back (manufacturer just gave 16.5" as the width. Surprisingly I fit all three without great difficulty in a Ford Escort (48.5" at narrowest point between the armrests, a bit wider elsewhere). Only problem is that the booster needs to have the shoulder seat belt buckled every time, which isn't easy. I plan on buying a short seat belt extender so that I don't have to reach down in between them to buckle the belt.

	Booster Seat A booster seat raises your child up so that the car's lap and shoulder belts fit correctly. The lap belt should fall across the upper thighs. The shoulder belt should go across the middle of the shoulder and chest. A booster seat is used for older children up to about 80 pounds. Some states have passed laws requiring booster seats for children up to age 8 or 80 pounds. Check your state's law.

	Graco - Click for more info Graco is one of the world's best known and most trusted juvenile products companies. They started the entire juvenile products industry with an invention called the Graco Swyngomatic. Since then they have invented products that have changed the way that parents travel with their children such as the travel system, which has made it so parents can lock an infant car seat into a stroller easily, without waking their sleeping baby. Their Graco SnugRide Infant Car Seat is pretty much synonymous with the term “infant car seat” because of its safety and design features coupled with its affordability. Today Graco continues designing and developing top-quality products that inspire parents and keeps children safe. Check out the new Infant Safe Seat Step 1 and Toddler Safe Seat Step 2 for proof of Graco’s continued commitment to child safety.

	Graco CarGo booster seat - Click for more info The Graco CarGo is a dependable and easy to use booster seat. When your child is on the lower end of the height/weight limits for the seat, the 5-point harness is used to keep them safely in place. It features a convenient one-pull snugging mechanism in the front of the seat - making it easy to tighten the straps down after your child has been buckled in. When your child is around 35-40" tall, the CarGo's harness can be removed, so that the seat can be used as a belt-positioning booster, using the vehicle's lap and shoulder belt. In this mode, the Graco CarGo will work for kids up to 54" or 100 lbs. Both the Platinum and the Ultra CarGo feature an Energy Absorbing Foam (EPS) liner, a removable, washable seat pad, and a cup holder. The Platinum CarGo is a softer and more comfortable seat than the Ultra CarGo (although still not as comfy as the well-padded Britax booster seats).