10W-30 and 10W-40 motor oil are a lot alike in terms of their ability to perform in a variety of temperatures due to the thinness of both grades. However, 10W-40 is slightly thicker, ...

Title says it all:What's the difference between 5w-30, 10w-30, and SAE 30?They're all 30 weight motor oils, but how do they differ? What are the advantages and disadvantages of each?

Shell Rotella’s new T6 10W-30 heavy duty engine oil is now available at over 6,000 O’Reilly Auto Parts locations, the ... T6 10W-30 can be used in place of a 15W-40 engine oil in most instances.

The 30 and 40 refer to the viscosity, or measure of the oil's resistance to flow, at 212°F. If the number is low, it's thinner at high temps. This means that the 10W-30 would technically not ...

New Shell Rotella T6 10W-30 Full Synthetic heavy duty engine oil with Triple Protection Plus technology is now available at over 6,000 O’Reilly Auto Parts locations and online at oreillyauto.com.