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Title: It'h proven itself to me
Review: I have used Mobil 1 in my 2003 Chev Tahoe since the first oil change and was considering the additional expense for the "extended performance" Mobil 1 oil. I sell industrial machinery and met up with a Mobil Engineer at a paper mill. This engineer swears by the stuff and was emphatic that it will perform to 15,000 miles under highway conditions. I have been using it for the last two oil changes, but I only run it 8-10,000 miles because I change my oil twice a year regardless. The filter needs to be considered as much as the oil and as long as I am going to be under the truck changing the filter, I'm going to dump the oil and grease the chassis. I use $10 Mobil 1 oil filters and the Mobil 1 synthetic grease. I found this oil much less expensive at my local Blain's Farm And Fleet store. They have it for $6.96 per quart.
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