At walmart their 5w-20 tech 2000 dino is more than $1/litre more expensive than the 30 weights. At over $3 a litre this stuff no longer is a deal IMO. I also see this with formula shell. Most of the companies don't charge more for 5w-20 so why would walmart and shell? Is it really that much more expnsive to produce? Are most companies making very little or losing money on 20wt oil?
