2. May 2006 “The First in Synthetics” ®

3. Heightened Awareness for Differential Oil Changes

4. What Most Vehicle Owners Don’t Know Differential gear lube needs to be changed, why? 1.Vehicle manufacturers require it. 2.34 to 93% Increased horsepower in newer vehicles stresses oil further. 3.Sump capacities have been lowered 4.Higher towing capabilities which can cause increased gear loading. 5.Hotter running differentials caused by less air-flow from improved aerodynamics. 6.Break-in wear particles need to be flushed out.

5. FrontRear Engine Differential Transmission Differential Location (rear between wheels)

6. Differential Internal Parts Cut-Away Pinion Gear Pinion Bearings Axle Bearings Ring Gear Limited Slip Clutches Carrier Bearings Spider Gears Side Gears

7. Top 5 Truck Manufacturers Differential Oil Drain Intervals

8. Tests Prove When the Differential Wear Happens & Why an Oil Change is Needed 6,869 Miles on Vehicle & Oil 493 PPM Iron Same Unit After Cleaning Iron Wear Particles

9. Tests Prove When the Differential Wear Happens & Why an Oil Change is Needed 16,766 Miles on Vehicle & Oil 542 PPM Iron Same Unit After Cleaning Iron Wear Particles

10. Tests Prove When the Differential Wear Happens & Why an Oil Change is Needed 50,994 Miles on Vehicle & Oil 608 PPM Iron Same Unit After Cleaning Iron Wear Particles

11. Tests Prove When the Differential Wear Happens & Why an Oil Change is Needed 146,764 Miles on Vehicle 18,101 Miles on SVG 83 PPM Iron Same Unit After Cleaning Very Clean Magnet

12. Tests Prove When the Differential Wear Happens & Why an Oil Change is Needed 6,869 Miles on Vehicle & Oil 16,766 Miles on Vehicle & Oil 50,994 Miles on Vehicle & Oil 146,764 Miles on Vehicle 18,101 Miles on SVG

13. When Does Most of the Wear Occur? VehicleMiles on VehicleMiles on OilViscosityIron Wear PPMOil Type #16,869 14.55493 GM Factory Fill #216,766 14.57542 GM Factory Fill #350,994 14.58608 GM Factory Fill #4146,76418,10114.9783AMSOIL SVG

14. How Good are AMSOIL Gear Lubes? “Trivia” 1.Given a vehicle that travels 60 mph and has a tire height of 28 inches, the tire must make 663 full rotations in one mile. The ring gear turns the same amount of revolutions the tire does. 2.AMSOIL recommends 100,000 mile differential oil drains for normal service. 3.The amount of ring gear revolutions in 100,000 miles is 66,300,000. 4.If the gear ratio is 3.73 to 1 then the pinion gear turns 247,299,000 times in 100,000 miles. 5.According to Ford, petroleum gear oil needs to be changed every 3,000 miles or 1,989,000 ring gear revolutions. Conclusion: AMSOIL makes a GREAT line of gear lubes to protect gears for a quarter million revolutions and for less $.

15. Where is AMSOIL Priced VS Competitive Oils?

16. May 2006 “The First in Synthetics” ®