Hi all. I have a Toyota eitos H/B. I only get 443km on 40lt fuel or 275.26miles on 10.56 gal. Full service history with Toyota. I was advised to change sparks. Done. But still poor fuel consumption. Im now told to clean injectors and o2 sensor. I was advised not to touch the injectors...please advise. I used rinsol on a full take before. Not much difference.