I use Penzoil's semi-synthetic and like it, only $12/gallon @ Wal*Mart. Last time I checked the P'zoil full non-dino oil was somethjing like $20/gallon.
Even the PowerTech brand full dino TC-W3 oil Wal*Mart sells is very good, as it is the SAME formula of the full dino oil as sold by one of the to-3 outboard Mfgr's. I have that factoid in a statement from an email to me by the Director of the NMMA who tests and certifies the TC-W3 oils.
My brother uses Yummie Lube pretty much exclusively and he swears it's the lowest smoking non-full-synthetic out there. But he buys it in bulk and I doubt he pays > $20/gallon.
And when I mean he buys in bulk - I mean in bulk!
Like me, I saw that P'oil semi-synth on sale for
$7/gallon, tax free, and I bought sooooooooooooooo much ... that I've been using it for 2-years now and I still have what ... some 13 gallons left? And I might go thru 20-gals in a good season!
But because I am a self-proclaimed cheap ba$tard, if/when heading offshore on long runs where I know I'll put 100 miles or more on the boat, I add the cheap $8-9/gallon oil from Wally World. What the heck, it's just gonna get burned out at cruise speed anyway
.
Yup, whenever you see oil on sale - BUY as much as you can, even if your wallet can't afford it. It is sure NOT going to go down in price!