There was a circle in Maria Burns' yard where grass wouldn't grow and trees died. She knew what it was: An old natural gas ...

A typical gas engine lubrication circuit consists of an oil sump, oil pump, oil cooler, pressure and temperature control valves, full-flow oil filters, and secondary filtration systems.

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Our team of experts narrowed down the best oil filters on the market. Read our review here. Search for ... Combine that and the decline of large-displacement gas-guzzlers with today’s smaller ...