3 ms·
That's pretty old. Around the 2013-2015 model years they upgraded the coatings in the fuel pump and injectors to accommodate the higher corrosion potential, mo
by jhayward 8y ago
That's pretty old. Around the 2013-2015 model years they upgraded the coatings in the fuel pump and injectors to accommodate the higher corrosion potential, mostly due to glycerin-bound water, in biodiesel.
As far as I know everything produced today is B20 rated or higher. The fuel systems are all made by the same two manufacturers for the most part.
- deleted 8y ago[deleted]
- sremani 8y agoThis is 2015-2016 manual http://www.porscheownersmanuals.com/2015-cayenne-manual/12/276/Diesel http://www.porscheownersmanuals.com/2015-cayenne-manual/12/2... 2017-2018 manual: http://www.porscheownersmanuals.com/2017-cayenne-manual/16/253/Refueling http://www.porscheownersmanuals.com/2017-cayenne-manual/16/2... I do not think there is 2019 Cayenne Diesel model, but I do not see anything other B5 or less.
- jhayward 8y agoThat's interesting, thanks for the links. Since they're using the same Bosch high-pressure pumps and injectors as everyone else I don't see any real reason for the restriction, except perhaps some conservatism in the specs. There's nothing about B20 that would bother any part of the engine or emissions systems once the fuel components are up to date. I suppose they may simply be running out old spec stock. Anyway, to your point, it is disappointing. Along with the whole defeat device thing.
- wutangson1 8y agowouldn't the astm spec for B20 (or any other blend of biodiesel) keep the level of glycerin, soaps, methanol, water, etc. low enough for that not to be an issue? I thought methyl-esters as a solvent would be better for the the engine anyway. But I had a guy tell me two weeks ago that he uses B100 in his new Mercedes wagon despite its 'blue tec' technology.