[NorthantsPete]

ok so 3 tanks on it hasnt happened since.

What I did:

Forte treatment with vpower.
Then a tank of vpower
Then a tank of bp ultimate

as the problem was still happening,

I went for Shell regular diesel (real diesel not gas stuff)
Added a shot ofMillers ecomax

been doing this for three tanks and no reoccurrence

maybe the cars dont like vpower/bp, but do like some additive on branded fuel

That or the forte benefit was delayed