Oil filter is quite important for engine operation, you may follow the listed steps to find an original filter. 

Surface
The powder coating of original filter shall be smooth and without deformation. The silk painting shall be in line. While the copy filters can not do this.

Quality of seal ring
Soft and resilient rubber ring is used on original filter, and of course the ring diameter shall be bigger for good sealing.

Inner stablity
Most of the copy filters structures are not stable, when you press the inner support with your finger, it is easly to get shaked.

Filter paper matrial and size
Everything is clear when you cut the oil filter.

Choose Genuine oil filter,such as fleetguard oil filter,to protect your engines better!