LANSING, Mich (WLMI)  Finally some good news for motorists at the unofficial start to summer begins this coming weekend.  According to Triple-A Michigan—gas prices are down 23-cents per gallon over the past week to a statewide average of $3.87.  Analyst Trilby Lundberg says prices should begin to stabilize as the price of crude oil slips.  The latest average is about $1.14 per gallon higher than it was at this time last year and the third consecutive weekly decline.