I am trying to wade through the morass of information on valve deposits and oil choices for this engine (the newer TFSI, not the FSI) to pick an oil for use when my new vehicle gets to its first change at 5K miles.
What I've concluded thus far is:
1. The TFSI may be an improvement over the FSI in terms of its design in controlling intake valve deposits, but the jury is still out on that.
2. Regardless, there does not seem to be any good, reliable way to control or prevent these deposits short of pulling the manifold and manually cleaning the valves periodically. Fuel and intake treatments, catch cans, etc. have all proven to be minimally effective at best.
3. Some oils appear to promote faster deposit formation than others. Various theories abound, mostly centered on the volatility of the lighter/vapor fractions of the oil that can get past even a catch can (which seem to be ineffective in preventing deposits). This may be caused or exacerbated by fuel dilution, so an oil that can control its own volatility in the face of fuel is good.
4. I have a 4 year/50K mile warranty and I am going to document proper oil changes with a 502.00 oil - that is worth more than any minor or speculative advantage in running a non-spec oil that supposedly forms fewer deposits.
Right now I am looking at M1 0W-40, GC 0W-30, and Motul 8100 X-cess. If anyone can suggest other 502.00 oil that is ester based or may have better volatility and/or fuel dilution characteristics, I'm all ears.
What I've concluded thus far is:
1. The TFSI may be an improvement over the FSI in terms of its design in controlling intake valve deposits, but the jury is still out on that.
2. Regardless, there does not seem to be any good, reliable way to control or prevent these deposits short of pulling the manifold and manually cleaning the valves periodically. Fuel and intake treatments, catch cans, etc. have all proven to be minimally effective at best.
3. Some oils appear to promote faster deposit formation than others. Various theories abound, mostly centered on the volatility of the lighter/vapor fractions of the oil that can get past even a catch can (which seem to be ineffective in preventing deposits). This may be caused or exacerbated by fuel dilution, so an oil that can control its own volatility in the face of fuel is good.
4. I have a 4 year/50K mile warranty and I am going to document proper oil changes with a 502.00 oil - that is worth more than any minor or speculative advantage in running a non-spec oil that supposedly forms fewer deposits.
Right now I am looking at M1 0W-40, GC 0W-30, and Motul 8100 X-cess. If anyone can suggest other 502.00 oil that is ester based or may have better volatility and/or fuel dilution characteristics, I'm all ears.
