[NorthantsPete]

So I plugged in my ecu ODB2 reader - it found since last reset an issue with the egr being out of range - i think it could be sticking or not able to open.

Im beginning to think these should only be run on premium fuel as the d4s are now suffering due to poor diesel and some taxi firms switched permenantly to premium. My avensis would only work right on premium.

Ive not had it yet on bp ultimate, so will continue to use premium and check back.

I would recommend for you, Archoil 6400 additive (£25 one off treatment) then premium fuel only and see how you get on

reading the manual it states also that half filling a tank results in more condensation, so a much needed filter change is required regulalry - also worth looking at.

I am currently testing the mpg to £ ratio.