Recently bought a 2000 Chevy Silverado with the 4.8 liter engine. I went to the parts store to get a filter the other day. I have always used AC delco on my trucks. Anyway the filter I was given was the PF46E. Same size as the one on my kohler lawnmower engine. How can a V8 engine use such a small filter? I hear some guys are using the pf61e on these engines. Should I stick with the short one or go with the longer or does it make much difference?