She's out!

Same goes for a lot of components on cars etc...

Thats not the point! A £10 filter may or may not be a 'good un' while a known and trusted source will be.

Sorry but this statement is incorrect. ISO 4548 1997 contains a whole heap of different filter efficiency tests together with ISO 23556 2007 containing a single soot efficiency test required for heavily retarded low emission engines.

Premium filters comply.
 
I have no clue regarding Fram, my words were 'use premium brand' Fram stuff not in that category as far as I am concerned. If you check technical spec of Perkins 2654407 and equivalent Fleetguard LF699 absolutely identical INCLUDING the drain back valve. Last time I was in the loop Mann & Hummel were OE suppliers of Perkins branded 2654407, however may have changed to Baldwin now simply due to politics.

Thanks, I have been using the 2654407, but will also consider the LF699 now.
 
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