I do know quite a lot about automobile mechanics, however, but I am certainly not an expert. (unsettledclimate.org)
If your car breaks down and you don't know much about automobile mechanics, will you hire an expert or do it yourself? (resumebymarissa.com)
Rather he has the kind of avuncular intensity you find in a great automobile mechanic — a mechanic who happens to be able to lift an engine with one hand while using the fingertips of the other hand to wrench the spark plugs out. (scientificamerican.com)