Hello Simon,
The last Rodeo i did was an import plus lived its life as a farmers pick up and he had no idea there were 2 spin-on fuel filters underneath the vehicle both on the N/S(left side) chassis rail sort of in-line with passagers front door (if its a double cab)
If its the original filter you may need the numbers.
The filters were in a bad way I'm sure he had a bit of home brew going through from time to time but he said he was sure its only ran on official pump fuel (Honestly your Honour )
Thanks,
Ian