It's almost a 'No-Brainer'....that synthetic oil is this much better.......why even take a chance putting cheap oil in your engine that cost several thousand dollars alone?
I work hard for my money and want the best for engines. Synthetic oil is cheap insurance. Why risk it?
Check this out....
This is another link that shows not only protection from sludge,but also 'dry starts'...
Dry damaging starts causes a good portion of the engine wear that occurs. This fact is another very important reason to use premium synthetics........to help lube the engine at start up. This might be just as important as sludge prevention..
This one is straight from Noria showing the benefits of synthetics. It shows sludge is an issue at the start of the article.