[Biturbos4] Synth Oil in the 2.7t

Ti Kan ti at amb.org
Sun Mar 21 22:49:35 EST 2004

Quincy Chiang writes:
> I use Mobil 1 0w30, that's what the owner's manual suggests.

Yup, 0W-40 wasn't widely available at the time our '00 and '01 cars
were built.  Now they are.

> Now here's a related question of mine:
> I know many people use the new 0w40, from my limited knowledge of
> lubricating oil, it seems that 0w40 would have to be a little thicker
> for its higher temp rating, yet it has to have similar lower temp flow
> capability.  So is it a better oil for the 2.7t?  The weather here in
> Calgary doesn't get overly hot in summer, but can get damn cold in
> winter, plus I plan on road tripping to SanFran next month so prolonged
> highway driving is a concern, hence want better high temp protection...

Yes, the slightly higher "hot" viscosity is a good thing in our
(very) hot running turbo engines.  Weather has very little to
do with the hot rating...  the internal temps of the engine gets
up there no matter what the outside temps are.  The "cold" viscosity
rating is the same between 0W-30 and 0W-40, so you get the same
advantage of quick flow and pressurization upon startup, even when
it's very cold outside.

2003 A4 1.8T multitronic
2001 S4 biturbo 6-sp
1984 5000S turbo
1980 4000 2.0 5-sp
 R 1 3 5  Ti Kan
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