Guys and guyesseses, thank you all for your inputs.
There is no aircon (are you kidding? Am still paying for training - "mummy, why are we starving?" -"Daddy`s training and nurturing his old diesel, honey . . ")
I think the tyres might have it - I`ll make `em like bricks next time.
Not having an air filter like an engineer`s oily rag might help too!
Thanks once again.