What kind of engine oil does Mustang use?

[JustinAnn]

Turbine engines use full synthetic oil with a viscosity of 40, while naturally aspirated engines use full synthetic oil with a viscosity of 60. The Mustang is equipped with two types of engines: one is a 2.3-liter turbocharged engine, and the other is a 5.0-liter V8 naturally aspirated engine. Here are the details: 1. Because the V8 engine generates more heat and operates at higher speeds, it requires oil with higher viscosity. During normal engine operation, the oil forms a film on the surface of various engine components, preventing direct contact and friction between them. 2. The viscosity of the oil should not be too high or too low. If the viscosity is too low, the oil cannot form a stable film on the surfaces of the engine components, which will increase engine wear. If the viscosity is too high, it will increase the resistance during engine operation, affecting the engine's power output and fuel economy.

[OBrielle]

As a Mustang owner, I pay special attention to engine oil selection during maintenance. The official Ford manual clearly states that the Mustang comes standard with 5W-20 full synthetic oil (certification standard WSS-M2C961-A1), with the 2.3T engine requiring oil changes every 8,000 kilometers, while the 5.0L engine can extend to 10,000 kilometers. Last time at the dealership, I noticed the newly introduced Ford-certified oil cans labeled 'Mustang Exclusive,' with viscosity parameters identical to the factory specifications. The service supervisor specifically reminded that in extreme high-temperature areas or for frequent aggressive driving, switching to 5W-30 is advisable, but it must ensure API SP or SN Plus certification; otherwise, the engine warning light might come on. I usually prefer using Mobil 1, feeling the engine sound is smoother during acceleration.

[AryaLee]

A friend who's into car modifications told me that modified Mustangs with aftermarket intake and exhaust systems need special attention to oil viscosity. His supercharged 5.0L Mustang has been using 5W-30 racing-grade full synthetic oil year-round, which actually reduced oil temperature by 5°C compared to factory oil. During a track day, I saw an experienced driver applying heat insulation film to the engine bay while emphasizing: if you frequently drive mountain roads or tracks, 30-weight full synthetic provides better oil film strength, but cold-start performance takes a hit. For northern winters below zero, it's recommended to keep a bottle of 0W-20 - otherwise, the 'clattering' chain noise during cold starts is heartbreaking. Tried Liqui Moly's green ester-based oil - the high-RPM protection is indeed outstanding, but the price could buy you four sets of wiper blades.

[LorenzoRose]

Running an auto repair shop for 15 years, I've handled hundreds of Mustang oil change cases. The key is to look for the Ford WSS certification mark and ACEA A5/B5 standard—don't be fooled by 'track-only' gimmicks on packaging. The 2.3T engine's oil pan has a unique design requiring precise 4.7-liter fills measured with a graduated cup. Last year, an owner carelessly poured a full 5-liter bottle, causing abnormal crankcase pressure that triggered fault codes. Turbocharged models benefit from molybdenum-formulated oil to reduce turbo bearing coking. Also, be cautious with pre-2018 imported versions—some parallel imports have oil pan labels specifying 10W-40, which is actually Middle East desert-spec oil.