Napa gold vs. Wix flow

[askoop]

Napa's website has different specs on the filters for my jeep than the wix site.

Napa says the gold version of wix 51085 has a flow of 9-11, but wix says that the 51085 has a flow of 7-9.

Oversize FL1A equivilant (wix 51515) and napa gold version are both 7-9.

Is it possible that one of the sites are wrong, or would wix make a different flow rate for the napa gold.

Reason I ask is that I'd like to run the fl1a or 51515, but not if the flow rate would be less than needed. I know many people run those on their jeep 4.0s with no issues, but I just had to replace my engine, and I used to run the fl1a. Dont think it caused the problem (blown up piston skirt and bearings going bad), but I want to be absolutely sure before putting my last fl1a on there or getting the 51515.

Thanks

 

[Gary Allan]

Don't worry about it either way. The 4.0 has no demand for high flow, so to speak. You don't have the Niagara Falls flow to the top end like a SBC does. You'll be lucky to 'need' 5 gpm of flow capacity. Even if you have a high volume oil pump, it's just not going to squeeze through the engine. I installed a HV oil pump (9gpm @ 3500, IIRC) and I'm up against the relief valve off idle in any oil above a 5w-20 synth.

You can use the FL1A sized filter. Just make sure that your motor mounts are in good shape.