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    Thread: What gas is permissible in this engine?

    1. Member
      Join Date
      Feb 8th, 2001
      2013 Passat TDI SEL Premium
      04-16-2017 02:31 PM #1
      I am looking at buying a new Passat with the 24V VR6, since we're doing the buyback on our TDI and I don't think that the 1.8 TSI engine is going to develop enough torque to satisfy us. What sort of fuel is permissible to run in these engines?

    2. Member jddaigle's Avatar
      Join Date
      May 30th, 2003
      Denver, CO
      2008 Passat Wagon VR6 4motion, 2013 FIAT 500 Sport
      04-17-2017 09:41 AM #2
      In a brand-new US market Passat you can run 87-octane, but you'll notice in VW's publications the horsepower and torque ratings are "achieved with premium fuel".

      So you can use regular but you'll get the best performance with premium.

      One other thing to keep in mind is that when you use regular your combustion temperatures will be lower (the ECU will retard timing to prevent pinging with lower octane fuels), which could lead to faster carbon buildup on the intake valves since heat is the only thing that burns those oil deposits off.
      - Jeff
      B6 Passat 3.6 & 4motion Resource Thread
      Now: 2008 VW Passat 3.6 4motion Wagon, 2013 Fiat 500 Sport
      Then: 1987 Volvo 745GLE, 1989 Volvo 740GL, 1994 Volvo 940T, 1995 Infiniti G20, 2000 VW Passat 1.8T, 2001 VW Jetta Wolfsburg Ed (x2), 2004 VW Golf TDI, 2006 Jetta TDI

    3. Member G60ING's Avatar
      Join Date
      Jun 27th, 2000
      Panhandle FL
      2010 3.6 4-Motion CC, 1990 G60/TDI/R36 Corrado
      04-17-2017 09:15 PM #3
      Also the hpfp likes the additive package that comes with premium fuel. Maybe you could run Lucas fuel treatment and low octane?

      If you are harping on fuel costs I can tell you the VR6 isn't for you. It's an engine people buy for the music and grunt it produces not its 20-25 mpg.

      Maybe you should look for a new discounted 2015 TDI? I saw a Jetta wagon listed for $15k

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