Specifically, the Fram Ultra listed for my Impala has a By-Pass Valve Setting of 9-15 psi. I just came across a GM service bulletin regarding the required spin on oil filter for my Impala, and the recommended GM filter's By-Pass Valve Setting is 14.5- 21.8 psi. This spec, and a lower efficiency, are the differences I can see from the Fram Ultra. Could GM's filter requirement be due to a higher volume oil pump, which would be the only way I can see to increase the pressure drop across the filter, thus requiring a higher By-Pass Valve Setting. Of course, I recently bought three Fram Ultra's for the Impala, to go with the M1 Walmart had on clearance. Do I need to get rid of the Fram Ultra's and buy oil filters from GM? The service bulletin is below: #15-00-90-002: Information for Installing the Correct Replacement Spin-On Oil Filter When Servicing - (Apr 1, 2015) Subject: Information for Installing the Correct Replacement Spin-On Oil Filter When Servicing Models: 2012-2016 Buick Enclave, LaCrosse 2012 Cadillac SRX 2013-2016 Cadillac SRX, XTS 2012-2013 Chevrolet Captiva (VIN L), Impala 2012-2016 Chevrolet Equinox, Traverse 2014-2016 Chevrolet Captiva (VIN L), Impala (VIN W), Impala (VIN (1) 2012-2016 GMC Acadia, Terrain Equipped with Engine RPO â€” LFW, LFX or LLT Excluding Police Vehicles Equipped with RPO â€” 9C1, 9C3 Attention: This Bulletin also applies to any of the above models that may be Export vehicles. -------------------------------------------------------------------------------- The Importance of Ensuring the Correct Replacement Spin-On Oil Filter is Installed â€ Importance of Using the GM Recommended Replacement ACDelcoÂ® PF63E Oil Filter Notice: ACDelcoÂ® PF63E (GM #19330000) oil filters meet GMPT performance specifications as defined by General Motors. The purpose of this bulletin is to reinforce to the Service Personnel the critical importance of using the recommended replacement ACDelcoÂ® PF63E oil filter that is specified by General Motors for these V6 engines when servicing them in order to ensure proper engine oil filtration and engine performance. Beginning in 2012 the V6 engine was redesigned with tighter engine tolerances. The oil pressure was increased to accommodate these tighter tolerances. As a result, the oil filter specifications of the production oil filter and the service oil filter were also improved to meet the new engine requirements. These V6 engines are factory built with an ACDelcoÂ® oil filter PF64, which is commonly confused by many in the automobile service industry as an ACDelcoÂ® PF48 because both oil filters have the same appearance and oil can size. However these two oil filters are not the same and have different internal specifications. The OEM PF64 oil filter has a much higher bypass valve rating that matches the service oil filter requirement of the PF63E which was specifically chosen to match the performance demands of these engines. The ACDelcoÂ® PF64 oil filter installed by the manufacturing plant meets the specifications of the ACDelcoÂ® PF63E, but due to the length of the ACDelcoÂ® PF63E oil filter can, the engine plant cannot build with it because it currently interferes with the assembly line process. ACDelcoÂ® PF63E Primary Performance Improvements The PF63E primary performance improvement relates to the bypass valve design. The ACDelcoÂ® PF63E has a compression spring loaded nylon poppet that outperforms the current valve design. Other benefits include the following: â€¢Designed with five times greater burst strength than most engine oil operating pressures after the oil reaches operating temperatures. â€¢Bypass valve opening pressure has been increased from 100 to 150â€kPa and is statistically more capable. â€¢Patented cellulose media traps particles that are 1/3 the width of a human hair. â€¢98 percent single-pass filtering efficiency at 25-30â€microns. â€¢Hot oil durability has been improved by the elimination of adhesive. â€¢Improved level of robustness to water accumulation. â€¢Excellent cold weather performance âˆ’22Â°F (âˆ’30Â°C) when using dexos1Â®. â€¢The element integrity (collapse strength), remains the same. â€¢The excellent filtration performance (efficiency and capacity) remains the same. â€¢The filter shell configuration is unchanged, which means existing oil filter cap wrenches continue to fit. â€ ACDelcoÂ® is a Registered Trademark of General Motors LLC dexos1Â® is a Registered Trademark of General Motors LLC GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information. WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION Â© 2015 General Motors. All rights reserved.