Speedo or GPS ?

[joeg]

Well, the easiest way to figure it out is to go for a drive and set your cruise for 60mph, then clock how long it takes you to run a mile on the road. Ten miles would actually be better since it compensate for any minor errors in distance between markers; if you're in Orlando right now I'd say get on the 528 and head for Canaveral. From my experience my Garmin V is always right on as far as speed goes, and my speedo was within 0.5mph before the lift and larger tires - now it reads about 2.5mph slow at 70 so on long trips I use the GPS for speed info.

I've got a 2400 mile (round trip) coming up in a couple weeks...I'll check it out on the highway, cruise, markers, at that time....Thanks for feed back.