“Three motor oil viscosities dominate the marketplace these days,” says Motoring TV mechanic Bill Gardiner, noting 0W-20, 5W-20 and 5W-30 as the big players.

But what does that mean to you?

Quite a bit, as Bill notes in this Tip of the Week, so sit back, relax, and get ready to learn.

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For more Motoring Tips check out MotoringTV.com.