The question of what kind of oil to put in your engine has gotten awfully complicated lately. Is synthetic really worth the duckets? Am I changing my oil too often? Not enough? Should I not have used castor oil? Why live in a world of confusion, when Blackstone Laboratories can help you find the exact right oil for your gas or diesel engine, while also helping to guage your engine’s health at the same time? Sure, it sounds weird to get someone an oil analysis report for their Christmas gift, but I got a DNA analysis for my mutt as a gift last year, and it was my favorite gift of the season. And aren’t trucks engines similar to a good, loyal pooch?