I used Shirlington Shell years ago with my old car, and know them to be both trustworthy and competent, so went straight to them when the check engine light came on in my 2006 Honda CR-V instead of trying to identify another garage. They may not be the cheapest in town, but you can be confident that they will be honest about what needs to be done, and that they will be able to do what is needed at the price they quote up front. I very much appreciated their working to get my car in early to accommodate my need to use the car to meet up with family members before they flew out of town. Although the job ended up taking a lot more time than I had hoped (I opted to get the A/C fixed), I still appreciated this consideration (and, we relocated the family reunion to Shirlington, so all was well.