All commercial additives have to be compatible with diesel and all diesel vehicles. So they can be used in any diesel vehicle if you so choose. The only question is if they help any at all. That answer can't be found without extensive laboratory testing which I have yet to see any. That Hotshotsecret LX4 Lubricity Extreme has some of the best HFRR scores I have seen though. That is the only reason I am trying it now. I have tried at least 12 different additives and have never been able to tell any difference. That is why I just started using diesel with some bio in it (<5%) instead. Right from the pump, no extra cost, good lubricity, don't have to carry some really stinky lingering potion around. There will always be those that are pouring just about anything available in their tank and willing to claim it is the best. Many, many threads here to back that up, any time someone even mentions additives. Probably the most discussed thing here next to "What oil is best".