My 2002 Honda's engine light went on- I knew it was past time for an oil change / oil refill. Went to another so called cost effective quick (took 45 minutes) oil change business near by first thinking they'd handle it - they didn't evaluate the check engine light code to verify if the code was for low or dirty oil, and light was left on. I went in to Diablo and Tim n staff were honest and upfront - the engine light was on for low / dirty oil. Tim said, "You get a pass today, no charge." Need I say more?