Extended Performance Full Synthetic Motor Oil 5W-30

Last verified May 31, 2026 by the Lifetime Picks Editorial Team

Mobil 1 Extended Performance is a full synthetic motor oil that ExxonMobil rates for up to 20,000 miles between oil changes, one of the longest drain intervals on the consumer market. Independent third party testing by the Petroleum Quality Institute of America (PQIA) on the High Mileage 5W-30 variant of this line verified it MEETS the API SP / ILSAC GF-6A and SAE 5W-30 standards: viscosity at 100C measured 11.6 cSt (within the 9.3-12.5 cSt range), cold crank viscosity at -30C measured 4,930 cP (well under the 6,600 cP maximum), and anti wear phosphorus measured 757 ppm (within the 600-800 ppm range). The bottle is also dexos1 Gen 3 certified (GM approved) and is the official motor oil of NASCAR. ExxonMobil claims 20X better high temperature protection vs. industry limits based on the Sequence IIIH engine test. Bottle uses at least 25% post consumer recycled plastic. The longstanding BIFL synthetic, r/MechanicAdvice references this as the easy answer when the brief is extended drain synthetic that protects engines past 200,000 miles.