What The HD In Engine Oil Means (And Why You Shouldn't Ignore It)
But there are other notations worth paying attention to on the labels of even the best motor oil brands, and the letters "HD" ...
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What The HD In Engine Oil Means (And Why You Shouldn't Ignore It)
We're not referring to the brand of motor oil you choose but the ... the likes of SAE and 5W-30, among other variations. While you've probably seen the HD tag on a bottle, those labels don't ...