Critique My Auto Shop Logo, Please

[Ronald]

A local tire shop is having me design a logo. Their current design is a dynamic set of blue and red text with flames sweeping off the top like some sort of muscle car logo. So far I showed the owner my first set of concepts and he immediately was drawn to my horizontal text layout. Sadly for me, he wasn't too fond of the cheerful serviceman graphic I created; however, I got him to consider the circular logo for the breast of a shirt. I told him that most local auto shops don't have a personification or mascot and that it will both stand out and have a vintage charm that seems to be gaining popularity in the modern marketing/design world. He said he'd look it over more and maybe "warm up" to it. Below is essentially the batch that I showed him; the only real change is the addition of "Est. '92" on the circular logos. I'd like to tidy up the serviceman graphic to be more realistic yet still very simplified. I might also decrease the size of the serviceman graphic as paired with the horizontal text. Thoughts? Suggestions?