They both read and clear trouble codes.
I've found they use similar algorithms for calculating mpgs. I use the same 13.5% calibration on both SG and UG for my wife's Elantra. 13.5% is about right for my xB, too, although I'm using 21% now with my UG, since I'd rather be pleasantly surprised than disappointed when I fill up.
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Darrell
Boycotting Exxon since 1989, BP since 2010
Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac? George Carlin
Mean Green Toaster Machine
49.5 mpg avg over 53,000 miles. 176% of '08 EPA
Best flat drive 94.5 mpg for 10.1 mi
Longest tank 1033 km (642 mi) on 10.56 gal = 60.8 mpg
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