I am going to add an oil filter to my 2180 VW. My oil cooler hoses are questionable so while I am replacing them I might as well add the filter too. The cooler hoses are AN-8. Do the oil hoses really need to be -8? I don't know for certain but I probably have a larger than stock oil pump. Even so, it is still a small engine. Would -6 hoses do the job? The -6 should be more flexible and easier to route in tight areas.