i just add a bottle in the gas tank and fill it up couple of days before im leaving for a long trip, just to give it some time to soak in and then burn it all off on the highway, i do it about twice a year.
i try not to mess with oil much, sea foam has its uses but i was never comfortable using it on my passat , on the other hand Chevron Techron is Well documented/tested on much higher performance motors than ours.
















