Amazon has a large selection of 5-Quart Mobil 1 Full Synthetic Motor Oil on sale from $25 with free shipping on $35+ or with Prime. Sale options include:

Advanced Fuel Economy

• 5-Qt Mobil 1 0W-16 Full Synthetic Motor Oil for $25
• 5-Qt Mobil 1 0W-20 Full Synthetic Motor Oil for $25
• 5-Qt Mobil 1 0W-30 Full Synthetic Motor Oil for $25

Extended Performance

• 5-Qt Mobil 1 0W-20 Full Synthetic Motor Oil for $27
• 5-Qt Mobil 1 10W-30 Full Synthetic Motor Oil for $27
• 5-Qt Mobil 1 5W-20 Full Synthetic Motor Oil for $27
• 5-Qt Mobil 1 5W-30 Full Synthetic Motor Oil for $27

European Car Formula

• 5-Qt Mobil 1 0W-40 Full Synthetic Motor Oil for $25

High Mileage

• 5-Qt Mobil 1 10W-30 Full Synthetic Motor Oil for $25
• 5-Qt Mobil 1 5W-20 Full Synthetic Motor Oil for $25
• 5-Qt Mobil 1 5W-30 Full Synthetic Motor Oil for $25

Run Like New

• 5-Qt Mobil 1 10W-30 Full Synthetic Motor Oil for $25
• 5-Qt Mobil 1 15W-50 Full Synthetic Motor Oil for $25
• 5-Qt Mobil 1 5W-20 Full Synthetic Motor Oil for $25
• 5-Qt Mobil 1 5W-30 Full Synthetic Motor Oil for $25

Extended Performance High Mileage

• 5-Qt Mobil 1 5W-20 Full Synthetic Motor Oil for $27
• 5-Qt Mobil 1 5W-30 Full Synthetic Motor Oil for $27

Truck & SUV

• 5-Qt Mobil 1 5W-20 Full Synthetic Motor Oil for $25
• 5-Qt Mobil 1 5W-30 Full Synthetic Motor Oil for $25