Most brands of filters don’t like petrol, some more so than others.
Petrol, Metho, Diesel & Kero will all have a detrimental effect on the filter material
Unifilter recommends Mineral turps for cleaning, or their own “Foam filter Cleaner” rinsed out with water
&
Any mineral based filter oil such as their own Filter fix, Belray or Castrol
Unifilter filter cleaner 1 Ltr-$ 20.75 5 Litr. $ 65.00
Unifilter filter oil 0.25 Ltr $ 9.30 0.5 Ltr $ 12.95
1 Ltr. $ 20.7 5 Ltr. $ 65.00
Pods are available in many different sizes, the closest for you is either 55mm I.D or 60mm I.D - 100mm long & 80mm O.D. & either in straight or 30 deg. Angle
Any of these options are…
$ 27.50 for the Pod
$ 9.30 for the optional second stage sock
$ 44.00 for the kit, Pod, Sock & 250ml filter fix oil
$ 4.50 postage