Hi guys, I am looking to place a bulk order (12) oil filters for my TDs from our forum Vendor. @Filterselite

I note the Ryco part numbers are different from the GQ to the GUIV. They both run 2 filters the same, the GU is not 2 different filters.

Now here it question. I have alway used the same filter on both cars without question but I noticed today there is 2 part numbers???

Can anyone tell me what the difference is between Z115 filter (GQ) and Z503 filter for the GUIV???

I think I have been running Z115 in both, is the Z503 bigger, better, ????

Cheers in advance.