1.9 TDI 130 mpg issues

[Andy_A.]

Hi guys,
I've noticed a huge drop in miles per tank recently on my 130 TDI. On a full tank I'm averaging between 320-380 miles. I had the car scanned on vagcom recently, it found I had an intermittent MAF sensor (only fault). I replaced it with a Valeo part (all they had in stock) it doesn't seem to have made any difference. I haven't had it plugged in since. Would it be worthwhile changing it to a Bosch one?

Cheers,

Andy.