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hi
well, car was serviced by nissan so i haven't a clue what oil they used, assuming the recommended 10w40
when i do my own service in 6 months time I will use a thinner oil and see what difference it makes
i've managed to get my average MPG up to 47.2 according to the onboard computer, but the only problem is i'm a pretty aggressive driver and suffer from road rage, so a lot of it has been 'behaviour modification' in terms of learning to just relax a little! has made a huge difference to my fuel economy though!
also, do 'injector cleaners' or fuel additives actually work?
many thanks
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