Actually, my experience with Marty Moore was good. That was some 15 years ago. I urgently needed some hard to find parts for my Revcon Motorhome, so I could leave on a long planned vacation with it, and he supplied them to me promptly, on my word alone. Not sure what kind of oil that other reviewer needed but, from the price of it, it must have been one among a variety of specialty items, which can be very pricey indeed unless you buy it in 5 gallon canister directly from a Shell or Chevron distributor. Marty must have made a mistake when he quoted a price perhaps too low to be credible for such an item (if it was), possibly below his own cost. It's usually better for a buyer to compromise with a scarce resource in such cases, so he may be able to return, should he need the resource again at a later date, and save himself the trouble and time to find another.