AMSOIL guide
AMSOIL 5W-30 Oil Guide
AMSOIL sells four 100% synthetic 5W-30 motor oils: Signature Series 5W-30 for up to 25,000-mile drain intervals, Extended-Life 5W-30 for a 12,000-mile interval, OE 5W-30 for the OEM oil-life monitor, and High-Mileage 5W-30 for vehicles with more than 75,000 miles. AMSOIL maintains current API and ILSAC certifications where applicable. Pick the family by drain interval target, then check that your owner's manual lists 5W-30 before changing the grade.
Shop AMSOIL Signature Series 5W-30
Quick answer: which AMSOIL 5W-30 should you buy?
If you tow, see severe service, or want the longest drain interval available, pick Signature Series 5W-30. If you want a full synthetic rated longer than factory intervals at a more accessible price, pick Extended-Life 5W-30. If you only need to meet the OEM-recommended interval, pick OE 5W-30. For vehicles with more than 75,000 miles that show light consumption, pick High-Mileage 5W-30.
AMSOIL 5W-30 tiers at a glance
| Family | Drain interval (normal) | Best fit | Where to buy |
|---|---|---|---|
| Signature Series 5W-30 | Longest-drain AMSOIL gasoline option | Maximum protection, longer service plans, towing | Buy online | Product details |
| Extended-Life 5W-30 (XLF) | Extended-drain service where applicable | Full synthetic at OEM-friendly price | Buy online | Product details |
| OE 5W-30 (OEF) | OEM oil-life monitor | Match the factory drain interval | Buy online | Product details |
| High-Mileage 5W-30 (HM530) | Per OEM interval | Vehicles with more than 75,000 miles | Buy online | Product details |
Which AMSOIL 5W-30 should you choose
Choosing between the AMSOIL 5W-30 families comes down to how long you want to go between oil changes, how hard the vehicle is worked, and how much you want to spend per fill. If you tow, see severe service, or want the longest drain interval, the Signature Series tier is the natural pick. If you want a full synthetic rated for longer than factory intervals but priced closer to OEM full synthetics, the Extended-Life tier covers that middle ground. If you only need to meet the manufacturer's recommended interval and want a strong full synthetic on a budget, OE is the right starting point.
Signature Series, Extended-Life, and OE 5W-30 are all 100% synthetic and carry the API and ILSAC service ratings appropriate to each formulation, so they are designed for modern gasoline engines that call for 5W-30, including those with direct injection, turbocharging, or hybrid powertrains. The deeper Signature Series breakdown lives in the Signature Series oil guide, and the full passenger-car family overview is in the AMSOIL car oil guide.
Pair AMSOIL 5W-30 with the right oil filter
Running 5W-30 on a longer service plan requires a filter built for the same interval. The AMSOIL Ea-O Synthetic Oil Filter is engineered for extended-drain AMSOIL service when matched to the right application. The oil filter guide covers shorter-interval picks where the Extended-Life or OE tier is the better fit.
Bottom line: which AMSOIL 5W-30 should you pick?
- Towing, severe service, or 25,000-mile target. Pick Signature Series 5W-30 (also online from AMSOIL).
- 12,000-mile interval at OEM-friendly pricing. Pick Extended-Life 5W-30 (also online from AMSOIL).
- Match the factory oil-life monitor. Pick OE 5W-30 (also online from AMSOIL).
- More than 75,000 miles on the odometer. Pick High-Mileage 5W-30 (also online from AMSOIL).
Save on AMSOIL motor oil with Preferred Customer pricing
AMSOIL Preferred Customer membership is $20 USD per year ($10 USD for a six-month trial) and unlocks up to 25% off on every product, including motor oil and filters. Add the membership to the same cart as your order and qualifying products switch to member pricing on that checkout, with no separate sign-up step. See the breakdown on the AMSOIL Preferred Customer page, or sign up directly through the AMSOIL Preferred Customer enrollment page.
AMSOIL 5W-30 FAQ
Is AMSOIL 5W-30 a full synthetic?
Yes. The Signature Series, Extended-Life, OE, and High-Mileage 5W-30 oils are all 100% synthetic formulations. There is no semi-synthetic or conventional 5W-30 in the current AMSOIL passenger-car lineup at this viscosity.
Can I use AMSOIL 5W-30 in a vehicle that calls for 5W-20?
Use the viscosity listed in your owner's manual. AMSOIL makes 5W-20 in the same product families if your vehicle calls for that grade. Substituting viscosities is generally discouraged unless the owner's manual specifically allows a different grade for certain operating conditions.
How long does AMSOIL Signature Series 5W-30 last?
AMSOIL publishes a normal-service guideline of up to 25,000 miles or one year, whichever comes first, with up to 15,000 miles in severe service. The full Signature Series breakdown lives in the Signature Series oil guide.
What is the difference between Extended-Life 5W-30 and OE 5W-30?
Extended-Life 5W-30 is rated for up to 12,000 miles or one year between changes. OE 5W-30 is formulated for the drain interval recommended by the vehicle manufacturer, typically 5,000 to 10,000 miles depending on the oil-life monitor. Both are 100% synthetic.
Does AMSOIL 5W-30 meet dexos1 Gen 3 and ILSAC GF-6A?
Signature Series 5W-30, Extended-Life 5W-30, and OE 5W-30 are all licensed against API SP, ILSAC GF-6A, and dexos1 Gen 3 requirements. Confirm the exact label on the data sheet for your viscosity.
Is AMSOIL 5W-30 safe for turbocharged engines?
Yes. All current AMSOIL 5W-30 formulations carry the API SP turbo-protection rating. Signature Series 5W-30 publishes data showing 72% better turbocharger protection than the GM dexos1 Gen 3 specification requires.
How often should I change AMSOIL 5W-30?
Match the change to the family. Signature Series: up to 25,000 miles or 12 months in normal service. Extended-Life: up to 12,000 miles or 12 months. OE: per the OEM oil-life monitor or interval. Pair with a matching AMSOIL oil filter sized for the interval.
Should I pair AMSOIL 5W-30 with an AMSOIL oil filter?
Yes for the long Signature Series interval. The AMSOIL Ea-O filter is rated 99 percent efficient at 20 microns and engineered to hold capacity through 25,000 miles. For shorter Extended-Life or OE intervals, an AMSOIL XG, MANN, or WIX filter sized to the interval also works.
Order AMSOIL 5W-30 motor oil
Order online from AMSOIL's Signature Series 5W-30 page. To unlock up to 25% off, add an AMSOIL Preferred Customer membership to the same cart and qualifying products switch to member pricing immediately, with no separate sign-up step.