Mobil 1 0w-20 at Wal-Mart now

The 0w-20 will be more fluid at freezing temps than 5w-20, but the viscosity of both will be the same at operating temp. Make sense? Wouldnt hurt to run the 0w-20 if its the same price, but I doubt there is much real world difference.
 
Doesnt the owners manual call for 5w-30..? Thats what im running, and its hot summer. I would think running 5w-30 in heat would be smarter than 5w-20... 30 is thicker at full temp., correct?
 
CRZYHRSGT said:
Correct, and if you run too thin of oil in the hot summer months you run the risk of loosing oil pressure.


Just what I thought.

I about used some 5w-20 then realized that it calls for 5w-30... Only reason I think I grabbed to 20 is cause they come in one 5 quart jug. That is freakin sweet, but oh well. But it gets pretty hot during the summer, dont want to run a thin oil then.
 
At my old shop (independent German) we always put 15W40 in all the cars. We would get the older water cooled VWs in the dead of summer rolling in with the oil lights flashing like crazy. 9 times out of 10 they usually had their oil changed at Jiffy Lube where they put in 10W30. We'd drain it out and put the thicker stuff in and problem solved. That sold me on using what the manufacturer specs say...
 
Ok. I did found some difference between the motorcraft and the mobil, especially approaching the 3000 miles change, but well, it may be a placebo effect or more peace of mind...:)

Dan
 
bemol said:
Ok. I did found some difference between the motorcraft and the mobil, especially approaching the 3000 miles change, but well, it may be a placebo effect or more peace of mind...:)

Dan
The only way your going to see a difference from one oil to another is by sending in a sample to a lab and getting an used oil analysis.

Unless that Motorcraft is rebottled Mobil 1, theres no way its better or even just as good.