Originally Posted By: volk06
If this is a mobil conventional it looks like Mobil Special. Mobil clean was discontinued a few years ago. The M1 is an expensive filter for a short run.
now that I think about it I think it, it was special. I bought the M1 filter after seeing the no name can that was used the first time. now I have the OEM filters and thats what will be going on it from here out.
book spec for severe service is 3700 mi. my driving fits that and then some. according to the dash read outs on a good week my average speed is 20-23 mph, a bad one is 14. this is per tank as I reset at each fill.