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Just bought a 2017 Diesel Discovery V and need to add DEF. LR specifies their DEF, but I have read several articles that seem to indicate that BlueDEF will work just as well. Has anyone tried using an alternative to the LR DEF?
The only tip I have is that you can't pour the DEF at full-speed—go slow, otherwise it backs-up the fill spout and all over the fender. Kind of a PITA, but at least you don't have to do it very often.
The main thing to look for with DEF is if it has the appropriate ISO spec (ISO 22241) and then you want to try and buy the freshest DEF possible. Learn how to read DEF date codes and make sure your DEF wasn't sitting outside in any heat.
I bought a DEF funnel similar to this one below and it worked great.