What is a PF35L large/elongated oil filter and will it fit my car?
This is the same diameter oil filter as the PF25 (standard 350 ci engine) filter, except it is longer. The standard one filters down to 30 microns, which means any particles 29 microns or smaller will continue to circulate. The PF35L has synthetic filter element which filters down to 12 microns which means 11 microns or smaller is the circulating chunk size. Because the filter is larger, it requires almost an extra 1/2 quart of oil to be added to crankcase. This longer filter fits and aligns flush with oil pan on 305 and 350 cubic inch engines in the the 3rd and 4th generation F-bodies, so there’s little risk of having it bottom out on bumps. But BEWARE if you have a 1995 model with an oil cooler housing since GM redesigned the ’95 cooler which causes the PF35L to hang slightly below the oil pan thereby taking the risk that it may hit the ground on bumps and dips. No 1996 or later models got a cooler so there should be no problem there.
