[Vwdiesel] cycling glowplugsGerry Wolfe gjwolfe at telus.net
Mon Feb 14 16:23:15 EST 2005
----- Original Message ----- From: <SLATERSFB at aol.com> To: <vwdiesel at vwfans.com> Sent: Monday, February 14, 2005 09:03 Subject: [Vwdiesel] cycling glowplugs <snip> Up until this year I had always used 15w40 fossil oil & start up below zero degrees F was always dicey. This year I switched to 15w50 Mobil One. The coldest it has been here so far is -12F & I had no problems starting either vehicle. With fossil oil, the pick up never would have started; Jetta, maybe. I know that where you are temps get much colder than this, but synthetic oil's gotta help. ... Bob in NY </snip> IMHO, viscosity of 15w40 fossil and 15w50 synth would be the same at low temps (altho the synth prob'ly has the edge in ultimate low temp pour point). Also, I think the Mobil 1 is primarily intended for use in a gasoline engines, used to be about CD level for diesels. If yer looking for a superior diesel synth oil, you would prob'ly be better off with a 5w40 or 0w40 diesel oil from Rotella, Mobil (Delvac) or Amsoil or similar. I personally found a pretty big difference in winter cranking speeds going from Rotella 15w40 fossil to Rotella 5w40 semi-synth. Just my $0.02Cdn... rgds, g.
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