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The engine won't blow up from using it, of course. You're simply causing excess wear. Sx-rated oil can't suspend the soot. So it falls out of suspension and wears rings, cylinders, chains, etc. It's your car of course, but what are you saving - maybe a couple bucks per oil change? Delo or Delvac is a whopping $6/gallon at most part stores, and you can find cheaper no-name brand oils that are Cx-rated for diesels. It's not expensive. Check the label on the stuff you use, maybe it IS rated for diesels and you never knew it. Oh well, there are also folks who use the problematic "green" coolant to save $4 every 3 years, instead of using the proper stuff.... penny wise and pound foolish, I believe is how that saying goes? **sigh**
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