I'm not challenging the idea of using WD40. It is simply that in forum postings (mostly diesel forums, both here and at dieselplace, thetruckstop.us, etc., some people have said that it is bad to use any kind of starting fluid, including WD40.

The reasoning I have heard is that diesels run on compression ignition, and therefore have much higher compression, and that EVEN WD40 can cause preignition, which would be damaging to the engine.

Sincerely,

PE

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83 240D - 4 speed manual - Manilla Beige
189K miles, Tachometer mod, cool wooden shift knob from PeachParts, CocoMats, Original factory paint, manual windows, manual sunroof. Starting to add AudioWrap to this car too!