I'm doing mostly synthetic engine oil now, I'm autocrossing the Neon so it sees the fuel cut off once in a while (6800rpm), and the tracker is known to have timing chain tensioner issues that I think comes from oil sludge build up. Synthetic oil generally sludges up less.
I am going to start changing the oil filter at 5,000km and then the oil and filter at 10,000km. I change my own oil and can get synthetic on sale for $20so it doesn't cost anything extra unlike the lube places. A change with synthetic would run $60 here...
Ian
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