$6.96
JIUDANI Fuel Efficiency Maximized: Pack of 2-1/4" 90 Degree Fuel Shut Off Valve Replacement for Tecumseh Engines 698181, 494539, 697944, and 35857Amazon$46.95
Combustion Analysis & Fuel EfficiencyAmazon$9.00
C3 Corporate Conundrums & Confusions: Delivering Clarity. Fueling Efficiency.Amazon$5.24
Saving Gas: Tips To Maximize Your Fuel EfficiencyAmazon$6.48
Valvoline 1 Quart 10W-30 Synthetic Motor Oil for Engine Wear Protection & Fuel Efficiency | 797578Lowe's$26.95
Accelerator Pedal Assembly, 6 Speed Accelerator Pedal With Travel Sensor, 84344895, Improved Fuel Efficiency, for Malibu 2016-2019Amazon$41.99
Autolite Iridium Ultra Spark Plugs With Laser-Welded Technology Creating Optimal Fuel Efficiency Along With 100,000+ Mile Durability – 4 pack (AI5363)Amazon$9.79
Micro Traders 2pcs CR8E Spark Plug Motorcycle Spark Plug Replacement Spark Plug 10mm Thread Improved Fuel Efficiency Compatible with SUZUKI YAMAHA BOSCHAmazon$32.99
Loddery A24041153212 Shutter Grille Air Actuator Motor Compatible for 2017 2018 2019 2020 Nissan Rogue Improved Driving Performance and Fuel Efficiency Easy Installation.AmazonSAVE $20.00
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Cecarol S10 Compact, Portable 10x10 Pop Up Canopy, w/Roller Bag, UPF50+ Tarp, Frame Optimized for Easy Carry, Trunk Spacing, Light Weight Engaging Fuel EfficiencyAmazon$74.99
WBGANG 2-Stroke Bicycle Motor Kit Bicycle Motorized Gasoline Gas Engine 100cc, Bicycle Engine Bicycle Motor Kit, 2-Stroke Gasoline Motorized Bicycle Conversion, Super Fuel EfficiencyAmazon$7.95
Automobile Mileage Maintenance Service Repair Fuel Logbook: Maximize Your Truck's Performance with the Ultimate All-In-One Maintenance Logbook: Keep ... Service, Repairs, and Fuel EfficiencyAmazon$99.99
Onlyfire Camping Rocket Stove Outdoor Portable Wood Burning Camp Stove with High Fuel Efficiency, Real Campfire Stove for Outside Bonfire, Patio & Backyard Cooking, 12.7 x 12.7 x 11.4 InchAmazon$199.99
OEDRO 6.5" Running Boards Compatible with 2019-2024 Dodge Ram 1500 New Body Crew Cab (Not for 19-23 Classic), Aluminum Alloy Side Steps Nerf Bars for More Fuel Efficiency, Black TexturedAmazon$161.99
OEDRO 6.5" Running Boards Compatible with 19-24 Chevy Silverado/GMC Sierra 1500 Double Cab (NOT FIT 2019 LD/Limited); 20-24 2500/3500HD, Aluminum Side Steps Nerf Bars for More Fuel EfficiencyAmazon