On 2010-10-08, Smitty Two wrote:

I found it consistently bad. It took me a couple of years to figure out
why my car ran smooth, powerful, and quiet sometimes, and other times

It was your location or your car. I had a Dodge van and a Honda
Civic. Both ran Arco better than any other brand. The van, which had
a non-stock cam, pinged badly during very hot weather. Arco was the
only regular I could run so my van would not ping badly. This in NorCal.

nb