R0B wrote:Does the smaller oil filter you have to use when fitting the speed shop one to a 2.1 make any difference? If not, then what is the point of the bigger one?
I wondered this ( as I was consiering buying one) and so I tested one on my tintop recently which has good oil pressure
A fresh W712/52 filter showed about 0.5 bar lower than a 6 month old standard filter at 80 degrees and 2000 rpm, by the time the oil got to 100 the difference was less maybe 0.2 bar down.
I'd say you would not want to let the smaller filter get old and clogged but a fresh one is OK I think if you have good oil pressure.
I would be concerned about using 20W50 and if I had poor oil pressure
standard filter ( 6 months old)
P1100039 80 deg oil pressure std filter by Paul_Barr, on Flickr
P1100055 100 deg oil pressure standard filter by Paul_Barr, on Flickr
P1100057 100 deg oil pressure idle standard filter by Paul_Barr, on Flickr
A fresh W712/52 filter
P1100103 80 degree oil pressure 71252 filter by Paul_Barr, on Flickr
P1100110 100 deg oil pressure 71252 filter by Paul_Barr, on Flickr
P1100111 100 degree oil pressure idle 71252 filter by Paul_Barr, on Flickr