Rated 4.7 out of 5 by 43
Rated 5 out of 5 by LARCARP myster oil
Have used this product for years. It always does the job. A friend saw me using it and was surprised it was still available. Told him to go to Pep Boys on the Concord Pike, and he could buy it there.
August 23, 2016
Rated 5 out of 5 by Homicide Awesome product
I love this product! It works wonders for my truck
August 22, 2016
Rated 5 out of 5 by SeaTurtle Works great
My engine is quiter and more throttle responsive
August 11, 2016
Rated 5 out of 5 by Zmanggg Good additive for fuel
I've been using this product for years with older cars that are driving on original injectors this product has proved to maintain as well as when I began, clean injectors in my 1995 and 2000 vehicles.
August 10, 2016
Rated 5 out of 5 by GGHONDA MYSTERY OIL
I HAVE USED THIS IN ALL MY CARS. IT WORKS GREAT. BETTER GAS MILEAGE,SMOOTHER RIDE. LOVE IT
August 6, 2016
Rated 5 out of 5 by Chev Great Product!
This product works fast. The engine always hesitated once the Marvel Mystery was added this product seemed to work really well. So far have experienced no more sputtering of engine. Thanks Pep Boys!!!
October 10, 2015
Rated 1 out of 5 by et2003 can't see it did any good at all
did not get what i expected
September 22, 2015
Rated 5 out of 5 by Bayoya Verry good product
Good not only for 4 astroke eng. but also 2 strokes
August 28, 2015