5W-30 was original factory recommended oil - then ford went to 5W-20 to save fuel. So either is ok. Use synthetic or sythetic blend if you can afford it (mobil 1 or castrol, etc)
Using 5W-20 oil instead of 5W-30 may result in reduced engine protection, especially in high-temperature conditions, as 5W-30 has a thicker viscosity at operating temperatures. This can lead to increased engine wear and potential overheating. However, if the vehicle manufacturer specifies 5W-20, using 5W-30 could also affect fuel efficiency and engine performance. Always refer to the owner's manual for the recommended oil viscosity for your specific vehicle.
You should use what your car recommends 5w-20 is thinner than 5w-30.
5w-20 5w-20
"To protect your engine's warranty use Motorcraft SAE 5W-20 or an equivalent 5W-20 oil meeting Ford specification WSS-M2C930-A. SAE 5W-20 oil provides optimum fuel economy and durability performance meeting all requirements for your vehicle's engine".
Personally , I would use the 5W-30 as stated in the owners manual , it's not until the 2001 Ford Ranger model that it shows to use 5W-20 in the 3.0 liter V6 engine
According to the 2002 Mercury Sable Owner Guide ( 5W-20 ) With engine oil filter change : For the 3.0 litre " Vulcan " V6 , and its flex fuel version ( 4.5 U.S. quarts of 5W-20 engine oil ) For the 3.0 litre " Duratec " V6 ( 5.5 U.S. quarts of 5W-20 engine oil )
Using 10W-30 instead of 5W-20 is generally not recommended, as it can affect engine performance and fuel efficiency. The numbers indicate the oil's viscosity at different temperatures; 5W-20 is thinner at low temperatures, providing better cold starts and fuel economy. If your vehicle's manufacturer specifies 5W-20, it's best to stick to that recommendation to ensure optimal engine protection and performance. Always consult your owner's manual or a mechanic for specific guidance.
use what is specified for your engine - by the manufacturer
No, but next oil change put the 5W-30 back in. If you live in a very cold climate it would be better for the engine to use 5W-20.
5w-30 or 5w-20
5w-20 or 5w-30 depending on climate