Iam wanting to change to synthetic oil, and on this board I have seen where the engine should be flushed, but the dealer here says that it does not have to be flushed. Please give me ammunition as to why it should be flushed?

 

Because most conventional oils have low oxidation resistance, they can produce a good amount of sludge in a short amount of time. When the sythetic started to break down all the sludge and varnish it tends to get collected in your filter. If your filter prematurely clogs, then it goes into by-pass mode and then unfiltered oil is going direct to your engine, which would accelerate wear.

There is another option instead of doing a flush, you can just change filters say at 1,000 then again at 3,000 miles. This would also gaurantee that the filters stay free of any obstruction.

I have used engine flushs on many customers with no complaints or problems. And it's very easy to do. So it's up to you which method you chose.

BTW, if you only have a few miles on your vehicle >20,000 you can disregard everthing that I said and just put the synthetic in and drive

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i have 37,000 on my 1999 4.6 should i use a flush and where can i get one thanks