Pennzoil Platinum is a full-synthetic motor oil available in 5W-20, 5W-30, 10W-30, 5W-40 Euro, and 5W-30 Euro. We chose the higher-viscosity 10W-30 to address our high-mileage needs, but newer ...

Amsoil has a complete line of diesel engine synthetic oils. The line features the Signature Series Max-Duty Synthetic in 5W-40, 5W-30, 10W-30, 15W-40, and 0W-40 grades. The line also includes ...

Motor oil comes in a variety of forms, designated by pairs of numbers, but the most common two are 10W-30 and 10W-40. What's the difference between them?

Heavy-duty engine oils can have a major impact on two of the top three equipment-related cost areas for fleets: fuel and maintenance. Are you using the best oils for your fleet's bottom line?