When you are going to look for FUEL Saving engine oil, you should always insist on: ILSAC GF-5 API SERVICE SN RESOURCE CONSERVING ILSAC GF-5 ILSAC GF-5 lubricants are expected to improve passenger car performance from the sparkplug to the tailpipe. These performance improvements are good news for lubricant marketers, auto manufacturers, consumers, and the environment. New lubricants are already being designed to deliver improvements relative to ILSAC GF-4 in the following categories: Improved fuel economy and fuel economy retention Engine oil robustness Protection of emission control systems Why GF-5? The Automotive Industry Speeds Towards GF-5 Emissions System Protection The ILSAC GF-5 Needs Statement indicates the ILSAC GF-5 performance must provide improvements to ILSAC GF-4 in Emission System Durability. For GF-5, Phosphorous has not been reduced from GF-4 (0.06% wt) due to potential wear concerns. As such, a minimum on Phosphorous content