I've rated as excellent in all categories as they delivered everything as promised and I am not aware of any other companies offering a free engine oil sampling kit along with comprehensive laboratory engine oil analysis services to individuals.

The sampling kit was simple to use and easily disposable and I found the maintenance recommendations useful. I am now more comfortable extending my service intervals knowing that my oil is still performing and has lower than expected wear metals and almost no contaminants. Thanks guys I intend to test every 5,000km from now on.

Approximate cost: $35