At a local Advance Auto Parts store, I was getting a new Oil Filter. So I asked the store clerk if he recommends an Oversized Oil Filter or a OEM regular size.

The Answer: He strictly adivce against an oversized Oil Filter for the following reasons:

1) Lower Compression Ratio. ?!!!
2) The Oil pump has to overtaxed and work at an overload.
3) You need more Oil for larger capacity Oil Filter


What is the concensus here?

 

OEM-Size, I use Wix (p/n 51334) partly due to their better flow and filter rate than any other filter.

 

Answer #3 would be correct (assuming you care about an extra 1/2 quart). The other two he just pulled out of a hat.

 

Those are some classic auto parts store clerk observations. Totally false. I used the Mobil I M105 oversized filter last oil change and the oil has stayed noticably cleaner. The only possible issue would be if the bypass spring inside the filter were incompatible with the car it was on. Then the oil might not get filtered properly. Does anyone know what car the oversized filter is for?

 

I have used the Amsoil sdf44 filter which is 30% est oversized,, I have not notice any problems. I also get my oil analyzed,, if there was any excessive problems it would have shown up there. Do a search,, there are many opinions out there on this subject. I haven't found any test data but if you do post it please... Also I have always put in five qts at every 10k change time and add 0.25 qt at my 5k filter change. So IMO oversize is ok on our cars. PS the blackstone are holding up after 7k miles. The lower hanger rubber broke because it's streched to tight,, do all the units pull this mount this tight??

 

m1-105

 

Your still pumping opil at the same rate. Just because there is a bigger filter, and a tad more oil, doesn't hurt the oil pump, it's always pumping to begin with

Lower compression ration....that has dick to do with the oil volume and filter.

 

 

I asked Jens about this once. The stock honda filter is very small. He said Honda just started using these and its the best for the CL .. I dont question him. I just let him do it