Hey rlamana,
The correct answer is "do what you do best to score". However, for most guys, it would be to follow or "chase" the oil line as it breaks down. Your movements won't normally be as drastic as 5 boards at a time unless you're a pretty big cranker. For example, you would want to move off a 4-7 leave by maybe 3 and 2(3 with your feet and 2 with your target). We also call this parallel adjustments. This way, all you're doing is constantly following the oil line to help you skid just like you did at 10 board when the oil was there. Chasing the line simply helps you create natural skid before you pick up in the midlane and then continue for the backend reaction. Some bowlers can adjust by speeding up and/or lofting, spinning and so on to create that desired skid thru the heads but it tends to be easier to utilize oil for that instead. Hope this helps...
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Rick Leong
Ten Pins Pro Shop
Track Amateur/Pro Shop Staff
Vise Grip Staff