Ok... my stash of the old 5w-30 Mobil 1 tri-syn is down to the last 5 quart jug.
My truck (1995 Ranger w/3.0L Vulcan) is on Ford's list of vehicles that have 5w-20 recommended. The owner's manual says 5w-30 or 10w-30(above 0 deg. F). Mobil's website says 0w-30 is approved for any 5w-30/10w-30 application.
Is there any advantage to the 5w-20 beyond helping Ford meet CAFE standards?
What about the 0w/5w/10w-30 oils? Are the 5 point winter viscosity steps of any significance in Dallas? (avg. nightly low around freezing)
Or should I just get whichever one's cheapest? (I'm only considering Group III and IV synthetics)
My truck (1995 Ranger w/3.0L Vulcan) is on Ford's list of vehicles that have 5w-20 recommended. The owner's manual says 5w-30 or 10w-30(above 0 deg. F). Mobil's website says 0w-30 is approved for any 5w-30/10w-30 application.
Is there any advantage to the 5w-20 beyond helping Ford meet CAFE standards?
What about the 0w/5w/10w-30 oils? Are the 5 point winter viscosity steps of any significance in Dallas? (avg. nightly low around freezing)
Or should I just get whichever one's cheapest? (I'm only considering Group III and IV synthetics)