I thought it was pretty good overall, especially once I found out that it was an actual womans voice and not a robot. [I hate videos narrated by robots]
1 thing that I would consider adding would be a visual graphic to accompany her key benefits to getting the engine detailed.
For example: When she says “A clean engine is a pleasure to work on”... Have those words appear on the screen preceded by “1.”
And on her next point, display “2. Shows pride of ownership”
“3. Mechanics take notice of a clean engine and will be more careful/do a better job when working on it”
“4. Adds value if/when you decide to sell the vehicle”
Being able to not only hear but more importantly see and read a list of benefits will stick in viewers heads and give them a simple yet memorable reminder of your services.
Just my 2 cents...