I used two methods - looking at dashboard and liters filled/distance travelled. Both methods give the same result. So, when I see bad numbers on dashboard as the result the distance is short. On my friends Aurion I see good numbers and as the result the distance is long. So, I am sure 100% - the problem is in our cars, not because of our "bad" driving style or quality of the petrol. We definitely must contact Toyota Service and check our cars. I will be back in 3-4 weeks and will contact the service at that time. Who else can go and check his\her car to figure out how much it might cost to repair? P.s. Do not reinvent a wheel changing you driving style or using 95 or V-Power. Go and check your car.