Saving money on lengthened OCIs isn't really the issue here. We were interested in proving that synth's lube quality can go the distance while still taking care of the engine's lube needs. Sidebar benefits of an oil analysis would include discovery of latent air filtration, combustion and cooling system issues. None on this vehicle but I did discover through Blackstone that I had an air filter/intake tract issue on my bulldozer.

BTW, that's my daughter's car. She's a mechanical engineer.

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Never a dull moment at Berry Hill Farm.