Join Date: Nov 2011
Location: Central Pennsylvania
Rep Power: 21
After a lot of discussion, most people will agree that staying with the weight recommended for your car is the best...yes there are a lot of disagreement about it, but staying with recommended weight isn't a bad thing. After saying that, I have been using Mobil One 5w-20 in my vehicles since it was Ford's recommended weight oil without any problems. I change every 3K miles, but that's because it's what I feel comfortable doing. Now in our Sable with 291K miles, I have been using Castrol High Mileage 5w-30 since we got the car since it had over 130K miles when we purchased the car. Again recommended weight. for the Sable.
Here's a post from our Ecoboost website, that helps explain oil & weight:
An interesting tidbit that I ran across should help those who do not understand the oil spec and what it means.
"Viscosity, at its most basic, is a fluid's resistance to flow. Within the engine oil world, viscosity is notated with the common "XW-XX." The number preceding the "W" rates the oil's flow at 0 degrees Fahrenheit (-17.8 degrees Celsius). The "W" stands for winter, not weight as many people think. The lower the number here, the less it thickens in the cold. So 5W-30 viscosity engine oil thickens less in the cold than a 10W-30, but more than a 0W-30. An engine in a colder climate, where motor oil tends to thicken because of lower temperatures, would benefit from 0W or 5W viscosity. A car in Death Valley would need a higher number to keep the oil from thinning out too much.
The second number after the "W" indicates the oil's viscosity measured at 212 degrees Fahrenheit (100 degrees Celsius). This number represents the oil's resistance to thinning at high temperatures. For example, 10W-30 oil will thin out at higher temperatures faster than 10W-40 will."
2010 Ford Taurus SHO-Livernois 4+X Tune, Airaid CAI, Caliper Covers, Tinted Taillights, Tinted Headlights, LED Interior Lighting, LED Puddle Lamps and License Lights, SHO Hood Stripes, Rearranged Trunk Badging, 3 Bar MAP Sensor, 160 Evenflo Thermostat, V3 Triton Switchback LED Front Parking/Turn Signal, EBC Slotted/Dimpled Rotors w/EBC Yellowstuff Pads
2013 Ford Explorer Limited-Wife's Tow Vehicle
1999 Ford Taurus SE Wagon-'Our Family Truckster"