JeffnDC

Anyone know if it will be possible when the US switches over to low sulphur gas, to retrofit the lean burn tech into the US A3s?

qfrog Ti20

If the engine is the same... then it would likely just be a software change

JeffnDC

Any idea on the MPG difference in Euro tune?

qfrog Ti20

you should check the european websites and convert their L/km to mi/gal

crew219

the issue is that the US doesn't have the NOx catalysts that are found on the EU units.

PD Performance

Euro 2.0Ts don't have it either so a retrofit would be kind of hard.

JeffnDC

From Car& Driver:
"A major benefit of FSI is its ability to run lean air-to-fuel ratios, but there's a side effect of more NOX production. Unfortunately, the catalysts that can clean the extra NOX would be contaminated by the high sulfur content of U.S. fuels, so although A3s in Europe run lean, they don't in the States."

So it looks like software + catalysts...