I haven’t used S&W myself, but I have ordered oil from them in the past. No complaints. Their synthetic oil is said to be really good (ester-based as opposed to PAG) and they’re friendly to deal with over the phone or by email. They usually use Fedex for shipping - and at least for me, 2-gallons of oil cost $17 to ship from PA to MN. Apparently UPS was more expensive. All in all, you won’t go wrong using their fuel - if using old iron/steel engines, I’d suggest a 50/50 blend of castor/synthetic at least. Using more synthetic oil than that can wipe out the piston seal in a worn engine.