Anyone having problems finding which oil filters fit GEN3? Me too. Did some poking around. Try: Fram PH6018, K&N KN-138, Mobil 1 M1MC-133, Napa 1359, STP PH7016, Suzuki 16510 series, WIX 51359. Did some more research and went with WIX 51359, but K&N and Mobil 1 filters also looked equally good or better, depending on the application. Mine is for everyday riding plus the occasional track day, so WIX fit the bill - quality build and performance specs under $9.