The letters on the bottle matter as much as the numbers
Most drivers know their engine takes something like 5W-30 or 0W-20. Fewer know that the viscosity is only half of the specification, and on many modern engines it is the less important half.
The viscosity. The numbers describe how thick the oil is cold and hot. The owner's manual lists what the engine was designed for, and the engine's clearances and oil passages assume it.
The approval or standard. This is the part that gets missed. Manufacturers increasingly require oil that meets a particular industry standard or their own approval, shown on the bottle as a code or a symbol. Engines with turbochargers, direct fuel injection or long service intervals are often the reason. Two oils with identical viscosity numbers can meet very different standards.
Diesel is its own category. A diesel pickup usually needs oil rated for diesel engines, which is labeled differently again. A gasoline oil in a diesel, or the reverse, can be the wrong product even at the right viscosity.
Why it matters beyond the engine
On a newer vehicle, the warranty may depend on the oil meeting the specification the manufacturer lists. A receipt that records the oil used, not just "oil change," is the evidence if a question ever comes up.
What to do
Check the owner's manual for both the viscosity and the standard, or bring the manual along. Keep the receipt, and make sure it says what went in.
An oil change is also a natural moment for a quick look at the rest of the vehicle. Anything that is due can go on scheduled maintenance, and an engine that uses oil between changes is worth a look under engine repair, both here. The national oil change page covers what the service includes.
About this store
The Henderson store opens at 7:30 AM, which suits a drop-off before work, and is managed by Derrick Madewell.
See the national oil change page for all 33 locations.