I mean how come an 2008 car lose it's "ferion" ?! That's not a normal thing for sure, the problem is that i bought my car just before 2008 (in october 2007), so it came with only 1 year warranty :( :(
All my friends who had similar "ferion" problems with their older cars told me that once u recharge your car with the "ferion", u'll need to do that again every 1-2 years !!