quieter operation, less consumption

I drive an Opel Vectra 1.6 16V petrol engine are 6 years.
I have added to LM MoS2 additive for workshop Standart Oil, the first two years.
Silk 4 years I make the rule interval itself and use the LM 10W40 MoS2.
At the very Anfag the car just ran with normal oil and the 2nd year I have the addition at an interval omitted times and could reproduce the effect.

The addition of MoS2 (Wikipedia: molybdenum disulfide, graphite-like, with particle sizes between 1 and 100 microns is a technical dry lubricant) affects at my car felt the smoothness (particularly Kaltsttart and idle) and has given me the average fuel consumption of 7.8 to 7 pressed 3 liters.

I use the additive are 6 years and 130.000km, 200.000km are now on the clock, and could find no further negative effects on inbsondere smoothness and reduction in consumption beyond.
Whether the addition or my gentle driving style has helped was once held up but the engine is still dry and purrs like the first day.