Thanks Mike, There are just TOO many details. Most synthetics aparently are produced to meet the lower end of the viscosity scale, and tend to hold better with higher temps and they can do this with fewer additives, which saves money ......pretty basic stuff. It also allows the higher fuel mileage rating to be met (and advertised). Unfortunately this is not the best choice for all engine designs. More and more engines are being developed requiring oils of a very specific viscosity rating. Dino 10W-30 comes to mind. To deviate from this can cause many problems to develop. Synthetics (being thinner) can be sucked up into the ring area more quickly, and even though they have fewer VI's, those additives that they do have can stick the rings. This will quickly result in higher oil consumption rates and an unhappy customer. Thanks for the clarification on the additives contained in synthetics. If I could modify my post to just pertain to dino oils, it would be more correct. I suppose my post was to slow things down and allow people to stop to think. Would it be better to go out and buy Shell Helix, or an Aero oil, or a racing oil, or stick with the manufacturers recomendations? Two things I'm certain of, Titanium_Alloy has is requested opinion, and I'm not ready to start filling my crankcase with vegetable oil!
