After reading around, I *think* I know what everyone will say.
I have 12 gallons of M1 FS 0w40 that I acquired. Ive read the positive opinions and about it's cleaning ability. I'm currently running it in my '11 Ram 5.7l. The Dodge forums seem to have a lot of people running 0w/5w40 in their 5.7l Hemi engines with the reasoning behind it is that that 6.2l/6.4l spec it. Engine seems to run fine, possibly a little quieter. I do from time to time get a code for incorrect oil viscosity, but it does not throw a CEL or disable MDS.
I was considering using it in my 3.7l Liberty which although has low mileage, I know for a fact that it didn't necessarily have the best care before I picked it up. That engine calls for 5w20. I've been running 5w30 in it. Any reason not to use the M1 0w40 other than a possible decrease in fuel economy?
I have 12 gallons of M1 FS 0w40 that I acquired. Ive read the positive opinions and about it's cleaning ability. I'm currently running it in my '11 Ram 5.7l. The Dodge forums seem to have a lot of people running 0w/5w40 in their 5.7l Hemi engines with the reasoning behind it is that that 6.2l/6.4l spec it. Engine seems to run fine, possibly a little quieter. I do from time to time get a code for incorrect oil viscosity, but it does not throw a CEL or disable MDS.
I was considering using it in my 3.7l Liberty which although has low mileage, I know for a fact that it didn't necessarily have the best care before I picked it up. That engine calls for 5w20. I've been running 5w30 in it. Any reason not to use the M1 0w40 other than a possible decrease in fuel economy?