8 plus years. 1 year with WIS in Washington, Kelso/Longview Would have stayed . wee went to Billings Mt from Kelso Wa with a tire shake, I was concerned and stated my concern , nothing was done to the vehicle , we were sent out into Oregon , next trip tire shake was worse . I did not wish to ride in vehicle, I considered vehicle unsafe .I had them drop me off . I have had 20 plus years as mechanic and driver and I am maybe anal when it comes to vehicles .