I have a set of 2001 Yamaha 200hp HPDIs. ~ 400hrs. Run Great. I don't do much idling, run at 4000-4300rpm. I don't foul plugs and it doesn't smoke too bad. Problem is that I used to buy bulk ~ $21/gallon but now they charge $28. Question is am I better off these days using a competitor's brand like Evinrude XD50 or Mercury Premium Plus? Both seem to be in the same price range. Many advocate for Pennzoil XLF or Synthetic which are quite cheaper and burn cleaner. Some dealers claim that these have been prone to gelling and clogging the smaller in-line oil filters.... Are they less expensive due to less corrosion protection/additives? I use 1oz Ring Free per 10 Gal of fuel with every fill. I keep my boat on my lift and therefore exposure to salt air is higher than average. I'm looking for the best oil not the least expensive. Please share your thoughts and oil analysis if you have any. Yamaha couldn't provide any details.
Thanks in advance.
Thanks in advance.